Based on the amount that Gordon and Lisa will needed in 40 years, and the rate earned on their funds, they need to save $9,392.
The amount is an annuity because it is constant. The $1,875,000 will be the future value of that annuity.
The formula is:
Future value of annuity = Amount x ( ( 1 + rate) ^ number of periods - 1) / rate
Solving gives:
1,875,000 = Amount x ( ( 1 + 7%)⁴⁰ - 1) / 7%
1,875,000 = Amount x 199.6351
Amount = 1,875,000 / 199.6351
= $9,392
Find out more on the future value of an annuity at https://brainly.com/question/27011316.