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2 years ago

7

Barack is saving up his money to buy a television that costs $395.50. Right now he has $85.00 and can save $29.00 each week. How

many weeks will it take for Barack to have enough money to buy the television?

1 answer:

aliina [53]2 years ago

5 0

Answer:

11 weeks

Step-by-step explanation:

Its easy

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A student wants to survey the sophomore class of 200 students about whether the school should require uniforms. A

Fittoniya [83]

Answer: C

Step-by-step explanation:

<u>Given:</u>

Sample size (n) = 50

x = 12

$\widehat{\mathbf{p}}=\frac{\mathbf{x}}{n}=\frac{12}{50}=0.24$

Confidence level = 90%

α = 1 − 0.90 = 0.10

α/2 = 0.05

$\text { Critical value }\left(z_{c}\right)=z_{\frac{\alpha}{2}}=z_{0.05}=1.6449$

(from standard normal table)

90% Confidence interval is,

$\begin{aligned}&\text { Confidence interval }=\widehat{\mathbf{p}} \pm z_{c} \times \sqrt{\frac{\hat{\mathbf{p}}(1-\hat{\mathbf{p}})}{n}} \\&\text { C. I }=0.24 \pm 1.6449 \times \sqrt{\frac{0.24(1-0.24)}{50}} \\&\text { C. I }=0.24 \pm 1.65 \times \sqrt{\frac{0.24(1-0.24)}{50}}\left\end{aligned}$

Therefore, 90% confidence interval for the true proportion of sophomores who favour the adoption of uniforms is C

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2 years ago

I need help writing the equations for these word problems, and maybe an explanation on how to write equations? I have a lot of t

TEA [102]

I hope this helps good luck

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2 years ago

2 pounds 13 ounces = how many ounces? *<br> Please help i will give brainliest :P

wolverine [178]

Answer:

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Step-by-step explanation:

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2 years ago

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Suman bought a tea pack of 0.345kg. From that, 40g of tea was taken. What

Yakvenalex [24]

Answer:

The remaining tea = 0.305 kg

Step-by-step explanation:

The mass of Tea pack = 0.345 kg

The mass of tea taken = 40 g

as

40 g = 0.04 kg

Therefore, all we need is to subtract 0.04 kg from 0.345 kg to determine the tea left:

i.e.

Remaining Tea left = Total tea - Tea taken

= 0.345 - 0.04

= 0.305 kg

Therefore, the remaining tea = 0.305 kg

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2 years ago

1.3.3 Quiz: Solving Linear Equations

EleoNora [17]

Answer:

A. Add three to both sides. D. Addition property of equality.

Step-by-step explanation:

You can follow PEMDAS to solve this, and I recommend you see your teacher for help.

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3 years ago