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vodomira [7]
3 years ago
6

Can some one help me answer these questions please I really need it ASAP

Mathematics
1 answer:
Stells [14]3 years ago
7 0
1) 5.3 (repeating)
2) 7.1
3) 27.6
4) 2.76
5) 5 4/7
6) 5 13/25
7) 2 1/4
8) 1 5/9

I hope this helps you :3
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What is the exact circumference of a circle with a radius of 15 cm? 10πcm 15πcm 30πcm 60πcm WIIL GIVE BRAINLIEST
ddd [48]

Answer:

(C) 30πcm

Step-by-step explanation:

In order to find circumference you use the formula C (circumference)=2(pi)(r) in which r is the radius. In this case, two and 15 are thirty so to find the circumference all you have is the equation 30 times pi centimeters is equal to the Circumference.

5 0
3 years ago
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0=x^2- 10x+10<br> Rewrite the equation by completing the square
zubka84 [21]

~~~~~~x^2 -10x +10  =0\\\\\implies x^2 -2 \cdot 5 \cdot x +5^2 -5^2 +10 = 0\\\\\implies (x-5)^2 -25+10 = 0\\\\\implies (x-5)^2 -15=0\\\\\implies (x-5)^2 =  15

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2 years ago
In 1990, the rate of change of the world population was approximately 0.09125 billion per year (or approximately 1 million peopl
babunello [35]

Answer: Option A

P = 5.3 + 0.09125t

Step-by-step explanation:

Note that for the initial year, 1990, the population was 5.3 billion.

The exchange rate is 0.09125 billion per year. In other words, each year there are 0.09125 billion more people.

In year 2 there will be 0.09125 * 2 billion people

In year 3 there will be 0.09125 * 3 billion people

In year 4 there will be 0.09125 * 4 billion people

In year t there will be 0.09125 * t billion of people

So the equation that models the number of people that there will be as a function of time is:

P = P_0 + rt

Where P_0 is the initial population

P_0 = 5.3 billion

r is the rate of increase

r = 0.09125 billion per year

finally the equation is:

P = 5.3 + 0.09125t

The correct answer is option A.

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3 years ago
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12 5/6 - 7 3/10 = Jan rig cufogy8vohc68​
noname [10]

Exact Answer: 83/15

Decimal Answer: 5.53 (bar notation above 3)

Mixed Number Answer: 5 8/15

Step-by-step explanation:

Convert the mixed numbers to improper fractions, then find the LCD and combine.

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3 years ago
A circular pizza with a diameter of 12 inches is cut along radii into three wedge-shaped slices. The measure of two of the centr
yan [13]

Answer:

A = 15π in²

Step-by-step explanation:

If two of the central angles are 80° and 130°, totalling 210°, then the third central angle must be (360° - 210°), or 150°.

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A = πr²  →  A = π(6 in)²  =  36π in².

The area of the largest slice, the one with central angle 150°, is

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