Answer:
The answer is A) 12.56 square inches
Step-by-step explanation:
The equation to find the answer is <u>3.14×r²</u>
r standing for radius. To find the diameter, you simply multiply the radius by 2.
Because they already gave us the diameter, the equation to solve this question is <u>3.14×4</u>
<u>3.14×4=</u><u>12.56</u>
They are 4 unit away from the Y axis because you are counting the square units from Y not the lines across.
Divide the y-value by the x-value.
(1/2) / (2/5) = 1/2 x 5/2 = 5/4
Answer: f(x) = 4*(4)ˣ Option C
Explanation:
We know the standard function of exponential function :
f(x) = a*bˣ
where is initial value
b is growth factor
x is time
Now given that two coordinates (1,32) & (4,2048)
Now put x = 1, f(x) = 32
32 = a*b¹
a*b = 32 ----------------------- (1)
now use second point
2048 = a * b⁴
a*b⁴ = 2048 ----------------------(2)
Now divide (2) / (1)
b³ = 64
b = 4
Put b = 4 in equation (1)
a (4) = 32
a = 8
So, final function is :
f(x) = 8*(4)ˣ
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