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3 years ago

PLEASE HELP! DUE TODAY :))

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

3 0

Step-by-step explanation:

do like the picture I sent

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How is the scale factor, surface area ratio and volume ratio related?

Travka [436]

The ratio of the surface areas of similar solids is equal to the square of their scale factor and that the ratio of their volumes is equal to the cube of their scale factor.

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2 years ago

Solving square root equations<br> 8 = square root of 15x + 4

makkiz [27]

Answer:

x is 4.

Step-by-step explanation:

8 times 8 is 64

64 minus 4 is 60

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3 years ago

Solve for a 2a + ab = b

amid [387]

Answer: a= b/ b+2

Step 1: factor out variable a.

a(b+2)= b

Step 2: divide both sides by b+2.

a(b+2)/ b+2 = b/b+2

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3 years ago

Solve 33 1/2 of 48<br><br> Plz thanks <3

SIZIF [17.4K]

Answer:

1608

Step-by-step explanation:

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2 years ago

The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consume

AfilCa [17]

Answer:

Yes. The male and female consumers differ in the amounts they spend.

Step-by-step explanation:

We can express the null and alternative hypothesis as:

$H_0: \mu_m=\mu_w\\\\H_1: \mu_m\neq\mu_w$

It is assumed a significance level of 0.05.

The standard deviation of the difference of means is calculated as:

$s=\sqrt{\frac{s_m^2}{n_m} +\frac{s_w^2}{n_w} } =\sqrt{\frac{35^2}{40} +\frac{20^2}{30} } =\sqrt{30.625+13.333} =\sqrt{43.958} =6.63$

The test statistic is

$t=\frac{(M_m-M_w)-0}{s}=\frac{135.67-68.64}{6.63}=10.11$

The degrees of freedom are:

$df=n_1+n_2-2=40+30-2=68$

The P-value for t=10.11 is P=0, so it is smaller than the significance level. The null hypothesis is rejected.

We can conclude that male and female consumers differ in the amounts they spend.

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4 years ago