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3 years ago

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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.

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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mars1129 [50]

Answer:

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Step-by-step explanation:

Cross multiply.

2(m + 2) = 5 * 1

2m + 4 = 5

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Answer:

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Step-by-step explanation:

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2a+ 3b + 4a^2 - 9b^2

Shtirlitz [24]

Answer:

$\bf\pink{(2a+3b)\times (1+2a-3b)}$

Step-by-step explanation:

<h2><u>Given Expression</u> :-</h2>

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<h2><u>Steps to factorise</u> :-</h2>

$\hookrightarrow\:\:\:\sf\purple{2a+ 3b + 4a^2 - 9b^2}$

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3 years ago