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3 years ago

Find the perimeter of this figure to the nearest hundreth use 3.14 as an approximate for pi

Mathematics

1 answer:

maks197457 [2]3 years ago

5 0

Answer: 40.56ft.

Step-by-step explanation:

First, lets find the perimeter of the half circle: c = 2pi(r)

pi = 3.14

r = 4

3.14 * 4 = 12.56

12.56 * 2 = 25.12

Then, because it is only have a circle, divide by 2.

25.12/2 = 12.56

10 + 10 + 8 + 12.56 = 40.56

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3 years ago

The sum of 69 and 42 is five more than the difference of 146 and a number. Calculate the value of the unknown number.

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3 years ago

The probability distribution of the amount of memory X (GB) in a purchased flash drive is given below. x 1 2 4 8 16 p(x) .05 .10

Rama09 [41]

Answer:

a) $E(X) = 6.45$

b) $E(X^{2} )= 57.25$

c) $V(X) = 15.648$

d) E(3X + 2) = 21.35

e) $E(3X^{2} +2) = 173.75$

f) V(3X+2) = 140.832

g) E(X+1) = 7.45

h) V(X+1) = 15.648

Step-by-step explanation:

a) $E(X) = \sum xP(x)$

$E(X) = (1*0.05) + (2*0.10) + (4*0.35) + (8*0.40) + (16*0.10)\\E(X) = 6.45$

$E(X^{2} ) = (1^{2} *0.05) + (2^{2} *0.10) + (4^{2} *0.35) + (8^{2} *0.40) + (16^{2} *0.10)\\ E(X^{2} )= 57.25$

$V(X) = E(X^{2} ) - (E(X))^{2} \\V(X) = 57.25 - 6.45^{2} \\V(X) = 15.648$

$E(3X+2) = 3E(X) + 2\\E(3X+2) = (3*6.45) + 2 \\E(3X+2) = 21.35$

$E(3X^{2} +2) = 3E(X^{2} ) + 2\\E(3X^{2} +2) = (3*57.25) + 2 \\E(3X^{2} +2) = 173.75$

$V(3X+2) = 3^{2} V(X)\\V(3X+2) = 9*15.648\\V(3X+2) = 140.832$

$E(X+1) = E(X) + 1\\E(X+1) = 6.45 + 1\\E(X+1) =7.45$

$V(X+1) = 1^{2} V(X)\\V(X+1) = 15.648$

6 0

3 years ago

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ExtremeBDS [4]

Answer;

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3 years ago

Find the perimeter of this figure to the nearest hundreth use 3.14 as an approximate for pi​

Find the perimeter of this figure to the nearest hundreth use 3.14 as an approximate for pi