Question

the radius r of a sphere is 6.1 mm. calculate the spheres surface area a. use the value 3.14 for π, and round your answer to the nearest tenth.

Explanation:

Step1: Recall surface - area formula

$A = 4\pi R^{2}$

Step2: Substitute given values

$A=4\times3.14\times(6.1)^{2}$

Step3: Calculate $(6.1)^{2}$

$(6.1)^{2}=6.1\times6.1 = 37.21$

Step4: Calculate $4\times3.14\times37.21$

$4\times3.14\times37.21=12.56\times37.21 = 467.3576$

Step5: Round to nearest tenth

$467.4$

Answer:

$467.4$