Sierra was given the following expression to solve. 30 + 20 + (3^2 − 4) x 2

She incorrectly wrote 32 as her answer.
Which statement best describes her mistake?

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64

the answer for the question that you are asking is 4

emily solved for a part when she should have solved for the whole. 875,000 should be the numerator of the equivalent ratio. 70 x 12,500 is 875,000. so the answer is 100 x 12,500 which is 1,250,000.