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3 years ago

11

Find the value of given expression

le=" \sqrt{230 - 5} " alt=" \sqrt{230 - 5} " align="absmiddle" class="latex-formula">

1 answer:

Zarrin [17]3 years ago

6 0

Answer:

i think it is 345 but not sure

Step-by-step explanation:

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Please help me please

gizmo_the_mogwai [7]

Answer:

SA=390

Step-by-step explanation:

9*14=126

126+126=252

14*3=42

42+42=84

9*3=27

27+27=54

252+84+54=390

3 0

3 years ago

If ab = 20 cm and bc = 4 cm, then what are the possible lengths for ac so that ab, bc and ac can form a triangle?

telo118 [61]

16<ac<24
If it is less than 16 it will not form a triangle and if it is more than 24 the other two legs will not be larger than ac is.

3 0

3 years ago

Write a rule for solving equations like 2x=24 without using model. Use a related division sentence to explain your answer.

erica [24]

2×2×2×2×2×2×2×2×2÷2×2×2=24 or 2×12r

5 0

3 years ago

Adult entrance fees to amusement parks in the United States are normally distributed with a population standard deviation of 2.5

kondor19780726 [428]

Answer: 1.509

Step-by-step explanation:

The formula of Margin of Error for (n<30):-

$E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 22

Level of confidence = 0.99

Significance level : $\alpha=1-0.99=0.01$

Using the t-distribution table ,

Critical value : $t_{n-1, \alpha/2}=t_{21,0.005}= 2.831$

Standard deviation: $\sigma=\text{ 2.5 dollars }$

Then, we have

$E=( 2.831)\dfrac{2.5}{\sqrt{22}}\approx1.509$

Hence, the margin of error for a 99% confidence interval for the population mean =1.509

4 0

3 years ago

Two students are standing 20ft apart and spot Mrs. Rose. If they immediately run opposite directions with speeds of 300ft/min an

bonufazy [111]

They would be separating at 500 ft/min

time to go 3000 ft at that speed

= 3000/500 min

or

= 6 minutes

this may help you

4 0

3 years ago