18. If geeta saves 40% of his monthly income and she spends Rs. 15000 every month, find her monthly income​

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.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

True or false look at the picture pls : /