Suppose a rectangle has length $\sqrt{85}$ and width $\sqrt{99}$. Which of the following is the best estimate of its area?
A) 172
B) 28
C) 38
D) 90

Question

Quizplus · Accepted Answer

The area of a rectangle is found by multiplying its length by its width. Here, the area is $\sqrt{85} \times \sqrt{99}$. Since $\sqrt{81} = 9$ and $\sqrt{100} = 10$, $\sqrt{85}$ and $\sqrt{99}$ are close to 9 and 10, respectively. Thus, the area is approximately $9 \times 10 = 90$.

Suppose a Rectangle Has Length 85\sqrt{85}85​ And Width 99\sqrt{99}99​ Which of the Following Is the Best Estimate of Which

Suppose a Rectangle Has Length $\sqrt{85}$ And Width $\sqrt{99}$ Which of the Following Is the Best Estimate of Which