How does the answer 60,000=P(1.7410) come from the equation 60,000 = P(1+0.02)^28? I need to see the whole equation.

The compound interest equation is P = C (1 + r/n)^{(nt)}. Where P is the calculated value, C is the initial amount, r is the interest rate, n is the # of times per year the interest is compounded, and t is the number of years invested. If you need 70,000 in 7 years and the interest is 7% quarterly, the equation would be

70,000 = C (1 + .07/4)^{(4)(7)}

You can then solve for C.

70,000 = C (1 + .0175)^{(28)}

70,000 = C (1.0175)^{(28)}

70,000 = C (1.6254)

C = 43,065.98