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Yuri [45]
3 years ago
12

The radius of a circle is (2x-3). What is a function for the area of the circle?

Mathematics
1 answer:
Oduvanchick [21]3 years ago
6 0

Answer

A = pi * r^2

= pi * (2x^-3)^2

= pi * 2^2 * (x^-3)^2

= pi * 4 * (x^-6)

= 4*pi * x^-6

Step-by-step explanation:

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A length of string is 42 1/2 inches long.
agasfer [191]

Answer:

5 5/16

Step-by-step explanation:

you just divide 42 1/2 by 8

6 0
3 years ago
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Please help! Will give brainliest to correct answer! (1/3) - 50 POINTS - please no wrong answers.
astraxan [27]

Answer:

( 6, pi/6)

Step-by-step explanation:

( 3 sqrt(3), 3)

To get r we use x^2 + y ^2 = r^2

( 3 sqrt(3) )^2 + 3^2 = r^2

9 *3 +9 = r^2

27+9 = r^2

36 = r^2

Taking the square root of each side

sqrt(36) = sqrt(r^2)

6 =r

Now we need to find theta

tan theta = y/x

tan theta = 3 / 3 sqrt(3)

tan theta = 1/ sqrt(3)

Taking the inverse tan of each side

tan ^-1 ( tan theta) = tan ^ -1 ( 1/ sqrt(3))

theta = pi /6

7 0
3 years ago
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If Ryan uses only 3/8 cup syrup out of the giant bottle each time he eats pancakes, how many times will he be able to eat pancak
elena55 [62]

Answer:

128 times

Step-by-step explanation:

Total cups = volume per meal × no. of meals

C = V × n

Divide each side by V

n = C/V = 48/(⅜)

Invert the fraction and multiply

n = 48 × ⁸/₃

Cancel 3s

n = 16 × 8  

Multiply

n = 128

Ryan can eat pancakes 128 times from his giant bottle without running out of syrup.

8 0
3 years ago
Estimate the answer to 943.18 + 103.89 by first rounding each number to the nearest ten.
IrinaK [193]
Your answer to this problem is going to be 1047.1 because, well, it is basic addition.
5 0
3 years ago
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A cat had a litter of 5 kittens. If each sex is equally likely, what is the probability that 3 or less were female kittens?
ASHA 777 [7]

Answer:

0.8125

Step-by-step explanation:

In this question, we are tasked with calculating the probability that 3 or less of her kittens were female.

Since each bsex is of likely probability, the probability of a male kitten = probability of a female kitten = 0.5

Now to calculate for 3 or less female kitten we are calcualting P(f) ≤ 3

In each case, we use the Bernoulli approximation

P(f) ≤ 3 = 5C3 m^{2} f^{3} + 5C2 m^{2}  f^{3} + 5C1 m^{4}  f + 5C0 m^{5}  f^{0}

Where m is the probability of a male kitten and f is the probability of having a female kitten with both values = 0.5

P(f) ≤ 3 =(0.3125) + (0.3125) + (0.15625) + (0.03125) = 0.8125

8 0
3 years ago
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