I do not agree. If you divide 240 by 30, it would be 8 heartbeats, which is absurd. It's impossible for something to survive with 8 heartbeats per 30 seconds.
In order to get the CORRECT answer, divide 240 by 60 seconds.
This would give you 4 heartbeats per second.
Then, multiply it by 30 seconds, which would give you 120 heartbeats.

CORRECT answer: 120

5 0

2 years ago

18. Emma rents a car from a company that rents cars by the hour. She has to pay an initial fee of $75, and then they charge her

love history [14]

Step-by-step explanation:

Let h be the number of hours.

Total Cost = Fixed Costs + Variable Cost

= Initial Fee + Hourly Charge

= 75 + 9h

Given,

$75 + 9h = 250 \\ 9h = 250 - 75 \\ 9h = 175 \\ h = 175 \div 9 \\ = 19 \frac{4}{9} hr$

Since the car cannot be rent part of an hour, the highest possible whole number is 19 hours.

5 0

2 years ago

Please answer question now

masha68 [24]

Answer:

3.1(3) mm

Step-by-step explanation:

V = l x d x h

188 mm³ = 5mm x d x 12mm

188mm² = d×60mm²

d = 188mm³/60mm²

= 3.1(3) mm

7 0

2 years ago