Can you please help me with this question (image)

A person's heart beats approximately 10⁵ times a day.

10⁵ in figures is 100000 beats each day.

A person lives for approximately 81 years.

So, now take your answer from before and multiply it by 81: 100000 × 81 = 8100000.

To change your answer to standard form, you make it into a decimal which is not greater than 9, so, 8.1 × 10⁶

And that is your 8.1 × 10⁶.

y=mx+b is the final answer!   : )

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls