2040. 10 times 4 is 40. If it happens every ten years then when the Olympics happen 10 times it would be 2040.
Third choice because 1,5 years at 7 percent would of been kore
The question containing the steps is missing.
Answer:

Step-by-step explanation:
5^2x=7^x+1 ⇔ ln5^2x = ln7^x+1 ⇔ 2xln5 = (x+1)ln7 ⇔ (2ln5-ln7)x = ln7
⇔ x = ln7/(2ln5-ln7)