2 years ago

1

Mathematics

1 answer:

Lisa [10]2 years ago

4 0

Answer:

what? what is this supposed to be?

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What is the solution to the equation 2^x+4 -12=20? A. x=0 B. x=1 C. x=2 D. x=9

seropon [69]

2^x+4 -12=20
2^x+4 = 20+12
2^x+4 = 32
2^x+4 = 2^5
x+4 = 5
x = 1

answer is B. x=1

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2 years ago

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If the radius of a sphere is increased by a factor of 3, then the volume of the sphere is increased by a factor of

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V = 4/3 π r³
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A sample of 16 items from population 1 has a sample variance 5.8 and a sample of 21 items from population 2 has a sample varianc

Nady [450]

Answer:

Reject the null hypothesis.

Step-by-step explanation:

n1 = 16

n2 = 21

S.V1 = 5.8

S.V2 = 2.4

$\alpha$ = 0.05

$H_{0}$ = Population Variance 1 ≤ Population Variance 2

$H_{a}$ = Population Variance 1 > Population Variance 2

Test statistic value = 5.8 / 2.4 = 2.417

Degrees of freedom is n - 1

15 and 20

Critical value is $F_{0.05}$ = 2.2

2.417 > 2.2

we reject the null hypothesis as the critical value is greater than the test statistic.

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2 years ago

Whats 125% as a fraction and a decimal

ZanzabumX [31]

125% as a fraction is 1 25/100 and in decimal form it is 1.25.

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3 years ago

12 more than 8,2 times a number n

Sholpan [36]

Answer: 12+8.2n

Step-by-step explanation: Your basically adding 12 to 8.2 times n.

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