Question 1

April took a number and multiplied it by a power of 9.Bob started with the same number and got the same result when he multiplied it by 27 raised to a number which was four less than the exponent that April used.What power of 9 did April use?

Accepted Answer

The answer of April took a number and multiplied it...

Question 2

An earthquake which is 520,000 times as intense as a zero-level earthquake has a magnitude on the Richter Scale which is 2.7 more than the intensity of another earthquake.What is the intensity of the other earthquake?

Accepted Answer

The answer of An earthquake which is 520,000 times as...

Question 3

The value of an investment of $3000 earning 7.25% compounded yearly is given by A = 3000(1.072  
,where t is the number of years it has been invested.If the amount of your investment is now $10,000,how long has it been invested?

Accepted Answer

The answer of The value of an investment of $3000...

Question 4

Solve for x: (  
= 129.3

Accepted Answer

The answer of Solve for x: (  
= 129.3...

Question 5

Solve for x:  
= 7

Accepted Answer

The answer of Solve for x:  
= 7...

Question 6

The demand function for a product is p = 45  
where q is the number of units and p is the price of one unit.At what price will the demand be 5 units? How many units will be demanded if the price is $12.42?

Accepted Answer

The answer of The demand function for a product is...

Question 7

Find x if 7  
= 1

Accepted Answer

The answer of Find x if 7  
= 1...

Question 8

An earthquake which is 48,000 times as intense as a zero-level earthquake has a magnitude on the Richter Scale which is 1.7 less than the intensity of another earthquake.What is the intensity of the other earthquake?

Accepted Answer

The answer of An earthquake which is 48,000 times as...

Question 9

The demand function for a product is p = 180  
where q is the number of units and p is the price of one unit.At what price will the demand be 15 units? How many units will be demanded if the price is $24.91?

Accepted Answer

The answer of The demand function for a product is...

Question 10

The demand function for a product is p = 90  
where q is the number of units and p is the price of one unit.At what price will the demand be 5 units? How many units will be demanded if the price is $18.00?

Accepted Answer

The answer of The demand function for a product is...

Question 11

The value of an investment of $1000 earning 8% compounded yearly is given by A = 1000(1.0  
,where t is the number of years it has been invested.If the amount of your investment is now $4000,how long has it been invested?

Accepted Answer

The answer of The value of an investment of $1000...

Question 12

The demand function for a product is p = 60  
where q is the number of units and p is the price of one unit.At what price will the demand be 15 units? How many units will be demanded if the price is $41.60?

Accepted Answer

The answer of The demand function for a product is...

Question 13

The sales manager of a department store finds that its daily sales begins to fall after the end of a promotional campaign.The sales in dollars as a function of the number of days after the campaign's end is given by S(d)= 36,000  
.If she does not want sales to drop below 30,000 per day before starting a new campaign,when should she start a new campaign?

Accepted Answer

The answer of The sales manager of a department store...

Question 14

Your friend started a savings plan with 2 pennies and each day he doubled the amount saved.Later you started a savings plan with 4 pennies and each day you quadrupled the amount saved.Your friend has been saving for 6 less than 3 times as many days as you.In two days you will put the same amount in savings as your friend.How many days have you been saving?

Accepted Answer

The answer of Your friend started a savings plan with...

Question 15

Solve for x:  
- 2 ∙  
- 3 = 0

Accepted Answer

The answer of Solve for x:  
- 2 ∙...

Question 16

An earthquake which is 7200 times as intense as a zero-level earthquake has a magnitude on the Richter Scale which is 3.6 less than the intensity of another earthquake.What is the intensity of the other earthquake?

Accepted Answer

The answer of An earthquake which is 7200 times as...

Question 17

Solve:  
= 27

Accepted Answer

The answer of Solve:  
= 27...

Question 18

Your friend started a savings plan with 3 pennies and each day she saved three times the amount she saved the previous day.Later you started a savings plan with 9 pennies and each day you saved 9 times the amount you saved the previous day.On the day that your friend had been saving for 8 less than 4 times as many days as you,you saved the same amount as your friend.How many days have you been saving?

Accepted Answer

The answer of Your friend started a savings plan with...

Quiz 5: Exponential and Logarithmic Functions

April took a number and multiplied it by a power of 9.Bob started with the same number and got the same result when he multiplied it by 27 raised to a number which was four less than the exponent that April used.What power of 9 did April use?

An earthquake which is 520,000 times as intense as a zero-level earthquake has a magnitude on the Richter Scale which is 2.7 more than the intensity of another earthquake.What is the intensity of the other earthquake?

The value of an investment of $3000 earning 7.25% compounded yearly is given by A = 3000(1.072 ,where t is the number of years it has been invested.If the amount of your investment is now $10,000,how long has it been invested?

Solve for x: ( = 129.3

Solve for x: = 7

The demand function for a product is p = 45 where q is the number of units and p is the price of one unit.At what price will the demand be 5 units? How many units will be demanded if the price is $12.42?

Find x if 7 = 1

An earthquake which is 48,000 times as intense as a zero-level earthquake has a magnitude on the Richter Scale which is 1.7 less than the intensity of another earthquake.What is the intensity of the other earthquake?

The demand function for a product is p = 180 where q is the number of units and p is the price of one unit.At what price will the demand be 15 units? How many units will be demanded if the price is $24.91?

The demand function for a product is p = 90 where q is the number of units and p is the price of one unit.At what price will the demand be 5 units? How many units will be demanded if the price is $18.00?

The value of an investment of $1000 earning 8% compounded yearly is given by A = 1000(1.0 ,where t is the number of years it has been invested.If the amount of your investment is now $4000,how long has it been invested?

The demand function for a product is p = 60 where q is the number of units and p is the price of one unit.At what price will the demand be 15 units? How many units will be demanded if the price is $41.60?

Solve for x: - 2 ∙ - 3 = 0

An earthquake which is 7200 times as intense as a zero-level earthquake has a magnitude on the Richter Scale which is 3.6 less than the intensity of another earthquake.What is the intensity of the other earthquake?

Solve: = 27