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3 years ago

Using the Histogram below, how many trees are between 150 cm and 200 cm tall?

Mathematics

1 answer:

densk [106]3 years ago

8 0

Answer:

I am pretty sure the answer is 30 trees, if I am not mistaken. (I took the test and forgot the answer but pretty sure its 30)

Step-by-step explanation:

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What is the value of x?<br><br> Enter your answer in the box.

devlian [24]

Answer: 26

Work: 90 - 64 = 26

This is the rule for complementary angles that are equal to 90 degrees.

3 0

3 years ago

Mary had 60$ and spent 3/4 on a coat. plus she brought a skirt with 1/2 she had left . how much do she have left?

evablogger [386]

3/4 of $60 = $45 for the coat
60 - 45 = $15 left
1/2 of $15 = $7.50 for the skirt
15 - 7.50 = $7.50 left

5 0

2 years ago

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

6 0

2 years ago

What are the solutions of this quadratic equation? 6x2 + 6 = 12x + 18

Doss [256]

Answer:

18x = 30x

i think thats it

Step-by-step explanation:

5 0

3 years ago

8. What is the result of (11x + 18i)(117 - 18i)?

Nonamiya [84]

1287x + 342 +(-198x + 2106) i

5 0

3 years ago