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lisabon 2012 [21]
2 years ago
11

Do the ratios 21:45 and 7:15 form a proportion?

Mathematics
1 answer:
Tasya [4]2 years ago
7 0

Answer:

yes, it form a proportion...

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Which of the following exponential functions represents the graph below
Ad libitum [116K]

Answer:

Option (B)

Step-by-step explanation:

Let the equation of the exponential function give in the graph is,

f(x) = a(b)ˣ

Since the given graph passes through two points (0, 3) and (-1, 1.5)

For (0, 3),

f(0) = a(b)⁰

3 = a(1) [Since b⁰ = 1]

a = 3

For (-1, 1.5),

f(-1) = a(b)⁻¹

1.5 = 3(b)⁻¹

1.5 = \frac{3}{b}

b = \frac{3}{1.5}

b = 2

Therefore, equation of the given function will be,

f(x) = 3(2)ˣ

Option (B) will be the answer.

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3 years ago
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Alex17521 [72]

Step-by-step explanation:

By Pythagoras' Theorem, we have

Hypotenuse = √[(13.9)² + (10.2)²] = 17.2. (B)

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3 years ago
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