I need help answering this math question using scientific notation

The average grain of sand on a beach is around 1.5 times 10 to the power of -5 g. Over several years, a beach goes through a natural process of weathering and loses approximately 4.3 times 10 to the power of 13 grains of sand.
What mass of sand is lost over this time period?
Give your answer in scientific notation form.
Mass lost = ?g

answer: 12

step-by-step explanation:

false

step-by-step explanation:

4y - 6 + 4y^2 - 9

before simplifying this contains 4 terms

after simplifying

4y -15 + 4y^2

it contains 3 terms

answer: ask

step-by-step explanation:

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine