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Luba_88 [7]
3 years ago
12

Have you ever thought about the number of times your heart beats in a life time? Consider the average life span of 75 years and

the average heart beat of 1.2 heartbeats per second. Estimate, using scientific notation, the number of times your heart will beat in your lifetime.
Mathematics
1 answer:
andreev551 [17]3 years ago
7 0
Roughly 2,365,200,000. If you have muiltiple choices round up to the nearest
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A baseball player gets 16 hits in 40 at bats. What percent of his at bats did not result
Katarina [22]

Answer:

40 percent

Step-by-step explanation:

Now percentage formula

Whatever

- - - - - - - - - - x 100

Total whatever

In this case your whatever is the hits. according to the question, if i said he had 40 hits in 40, that's a 100percent. So... Your whatever is 16, total whatever is 40

16

- - - - - - x 100

40

= 40 percent

6 0
3 years ago
What is the solution to the equation 7,- 5* ++5
maw [93]

Answer:

the answer to the problem is h=7

5 0
3 years ago
I don't really get it ​
blsea [12.9K]

I can't see the whole pic...

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3 0
3 years ago
Bro I am so bad at math and I need help ;-;
serg [7]

Answer:

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4 0
3 years ago
A games shop sells marbles
Taya2010 [7]
To start, the question is asking for surface area of a cylinder, meaning you will have to use this formula to find it: A=2πrh+2πr^2.

Since you already know that the diameter of the plastic cylinder is 4 marbles long, and each marble is 2 cm in diameter, you would multiply 4 and 2 to get that your diameter is 8 cm. However, since the surface area of a cylinder formula uses radius, you would simply divide 8 by 2 to get that the radius of the cylinder is 4 cm. 

Now, since you already know that the height of the cylinder is equal to 10 marbles, multiply the amount of marbles by 2 to get that the height of the cylinder is 20 cm. 

Now that you know the height and the diameter of the cylinder, plug the values into the formula: A=2π(4)(20)+2π(4)^2.
Assuming that pi is 3.14, simplify the equation as according to PEMDAS and you get that the area of plastic needed to make one cylinder is 602.88 cm squared
5 0
4 years ago
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