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3 years ago

6

Factor each expression. 8.) 8 + 16=

2 answers:

Novosadov [1.4K]3 years ago

5 0

8 + 16
= 24 !!
:)) hope this helped

sveta [45]3 years ago

4 0

Answer:

24

Step-by-step explanation:

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You have been asked to build a scale model of your school out of toothpicks. Imagine your school is 30 feet tall. Your scale is

Kipish [7]

Answer:

The model will be 6 toothpicks tall.

Step-by-step explanation:

your school is 30 feet tall and 1 feet is 1.26 cm, so you would most likely multiply 30 and 1.26 in order to get the height of the scale model which is 37.8 cm. Each toothpick is 6.3 cm, you would take 37.8 and divide it by 6.3 to get the number of toothpicks So, for you to build the school, it would be 6 tp tall.

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3 years ago

Can you help me find the value of x and y?

RSB [31]

Answer:

Step-by-step explanation:

x/5=8/10

x=40/10

x=4

y/5=6/10

y=30/10

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3 years ago

8) За (x-y) - (х-у)

mel-nik [20]

Answer:

$3a \times x - y - x - y \\ 3a \times x - x - y - y \\ 3a \times - 2y - \\ - 6ay$

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4 years ago

The radius of the base of a right circular cone is 5 times greater than the radius of a second right circular cone. If the heigh

nikitadnepr [17]

The radio is 10 C hope works

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3 years ago

Most dermatologists recommend using sunscreens that have a Sun Protection Factor (SPF) of at least 30. One of the authors wanted

Basile [38]

Answer: We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

Step-by-step explanation:

Given : Significance level : $\alpha: 1-0.95=0.05$

Sample size : n= 52 , which is a large sample (n>30), so we use z-test.

By using z-value table,

Critical value: $z_{\alpha/2}=1.96$

Sample mean : $\overline{x}= 34.55$

Standard deviation : $\sigma= 20.12$

The confidence interval for population means is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

i.e. $34.55\pm(1.96)\dfrac{ 20.12}{\sqrt{52}}$

$=34.55\pm5.46867829455\\\\\approx34.55\pm5.4687\\\\=(34.55-5.4687, 34.55+5.4687)=(29.0813,\ 40.0187)$

Now, the 95% confidence interval for the ppopulation mean = . (29.0813, 40.0187)

Hence, We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

7 0

3 years ago