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4 years ago

Need help on these questions

Mathematics

1 answer:

Genrish500 [490]4 years ago

5 0

Problem 10

You are correct. The answer is choice C. The cm^3 notation represents cubic centimeters, which is a unit for volume. Think of a 1 cm by 1 cm by 1 cm cube.

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Problem 11

This problem is a bit strange. She borrows money ($100) but then it says she earns $300 per day. It makes no mention of her paying that $100 back, or when it's due back. I'll just assume that she keeps the $100 for the 12 days.

If that assumption is correct, then she'll have y = 300x+100 dollars after x days.

Plug in x = 0 and you'll get y = 100. Plug in x = 12 and you'll end up with y = 3700. Therefore, the two points on this graph are (0,100) and (12,3700).

The only window that has y = 3700 in it is the interval $-150 \le y \le 3700$ while the other windows are too small. So only choice D is the answer here. In other words, you'll have "yes" on choice D, and "no" on everything else.

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Carl is going to make a frame for a picture. The dimensions of the frame need to be 2 feet by 18 inches. How long must the board

kenny6666 [7]

A rectangle has two pairs of sides of equal length. 

So perimeter P = 2ft + 18in + 2ft + 18in 

The units have to be all the same to add them so.... 

P = 2ft + 1.5ft + 2ft + 1.5 ft 

P = 7 ft. 

So the board would have to be 7 feet to make a 2ft x 1.5ft picture frame.

3 0

4 years ago

Select the correct answer.

Georgia [21]

Answer:

C. transfer $50 per month into a savings account

Step-by-step explanation:

A measurable goal is one measured in a manner that tangible evidence can be presented to show how it was achieved.For example, You can prepare for a Math test on Friday by studying Math every evening and then meeting with your Tutor on Wednesday.

In option C, there is an amount $50 transferred every month in a saving account.

Amount can be presented for checking, there is an element of time/duration for tracking and the destination

6 0

3 years ago

What is 5x + 7 = 11

Helga [31]

Answer:

4/5

Step-by-step explanation:

Subtracting 7 from both sides you get 5x=4 dividing by 5 you get 4/5=x

5 0

3 years ago

Read 2 more answers

PLEASE ASAP ILL GIVE BRAINLIEST.

Dominik [7]

Answer:

second option is the answer

4 0

3 years ago

Read 2 more answers

A researcher wishes to determine whether people with high blood pressure can lower their blood pressure by performing yoga exerc

Anastaziya [24]

Answer:

90% confidence interval for the difference between the two population means

( -23.4166 , -6.5834)

Step-by-step explanation:

Step(i):-

Given first sample size n₁ = 100

Given mean of the first sample x₁⁻ = 178

Standard deviation of the sample S₁ = 35

Given second sample size n₂= 100

Given mean of the second sample x₂⁻ = 193

Standard deviation of the sample S₂ = 37

Step(ii):-

Standard error of two population means

$se(x^{-} _{1} -x^{-} _{2} ) = \sqrt{\frac{s^{2} _{1} }{n_{1} }+\frac{s^{2} _{2} }{n_{2} } }$

$se(x^{-} _{1} -x^{-} _{2} ) = \sqrt{\frac{(35)^{2} }{100 }+\frac{(37)^{2} }{100 } }$

$se(x^{-} _{1} -x^{-} _{2} ) = 5.093$

Degrees of freedom

ν = n₁ +n₂ -2 = 100 +100 -2 = 198

t₀.₁₀ = 1.6526

Step(iii):-

90% confidence interval for the difference between the two population means

$(x^{-} _{1} - x^{-} _{2} - t_{\frac{\alpha }{2} } Se (x^{-} _{1} - x^{-} _{2}) , x^{-} _{1} - x^{-} _{2} + t_{\frac{\alpha }{2} } Se (x^{-} _{1} - x^{-} _{2})$

(178-193 - 1.6526 (5.093) , 178-193 + 1.6526 (5.093)

(-15-8.4166 , -15 + 8.4166)

( -23.4166 , -6.5834)

4 0

3 years ago