Is she correct? Why or why not?

No, she is incorrect.

Step-by-step explanation:

equals 8 and equals 9. Mandy probably multiplied the 2 and 3 by the exponent instead of by itself a number of times equal to the exponent. 2^3 is equivalent to 2*2*2, not 2*3. 3^2 is 3*3, not 3*2. Therefore she is incorrect because they are not equal.

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