Using π = 3.14, find the area of a circle with a radius of 4.2. Round your answer to the nearest hundredth. will give brainliest

Step-by-step explanation:

A=pi*r^2

A=3.14*4.2^2

A=3.14*17.64

A=55.3896

A≈55.39 units ^2

55.42

Step-by-step explanation:

So since we know that how you calculate a circle's area is the formula -->

π (r)^2 (r is radius), We can simply just plug all the numbers in -->

3.14 (4.2)^2 => 4.2 squared is 17.64 => 3.14 (17.64) = around 55.417 but since we want to round it to the nearest hundred, we get 55.42

Hope this helps!

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²

answer

step-by-step explanation: