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3 years ago

Help please What is the value of b?

Mathematics

1 answer:

Marizza181 [45]3 years ago

5 0

Answer:

3 $\sqrt{13}$

Step-by-step explanation:

Find 'c' first by using the Altitutude Rule:

4/c = c/9

cross-multiply to get:

c = $\sqrt{36}$ or 6

Now you can find 'a' by using the Pythagorean Theorem:

4² + 6² = a²

a = $\sqrt{52}$

Now you can find 'b' by using the Pythagorean Theorem:

( $\sqrt{52}$ )² + b² = (9+4)²

52 + b² = 169

b² = $\sqrt{117}$

b = $\sqrt{117}$ = $\sqrt{3}$ $\sqrt{3}$ $\sqrt{13}$

b = 3 $\sqrt{13}$

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Answer:

$7.8 * 10^{10}$ is scientific notation of 78 billion

Step-by-step explanation:

For scientific notation , follow the following notation:

$a * 10^{b}$ -------->(equation 1)

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Put the value of 'a' and 'b' in (equation 1)

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