Determine which operation is needed in each so that the expression simplifies to 25, Note: each operation (+, , X, and +) may be used more than once.
40 __ 10 __ 4___ (8 __ 2 __ 3) __25

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Interest begins accruing the date of the transaction except for auto loans mortgages credit card cash advances credit card purchases

Having a hard time understanding this question (see attachment).