Ask question

Ask question

All categories

3 years ago

15

Please help Please help Please help

1 answer:

san4es73 [151]3 years ago

4 0

Answer:

angle 1 = 52°

angle 2 = 90°

angle 3 = 38°

angle 4 = 38°

You might be interested in

Please help me every one

Rus_ich [418]

What question do you need help on because I can see you did one of them

7 0

3 years ago

George runs an outlet where he sells personalized T-shirts. He spends $35 to rent the printing machine and $25 for phone service

Alex_Xolod [135]

If you're asking how many shirts he needs to sell in a month to start making a profit, the answer is:
t stands for amount of shirt
add how much he used for phone and print machine
35+25
$60+5.80t-10t=0
refine
60-4.2t=0
multiply both sides by 10
600-42t=0
600=42t
divide both sides by 42
t=100/7 which is approximately 14

4 0

3 years ago

Read 2 more answers

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

ozzi

Answer:

The 80% confidence interval for the mean usage of water is between 18.4 and 18.6 gallons per day.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.8}{2} = 0.1$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.1 = 0.90$ , so $z = 1.28$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.28*\frac{2.3}{\sqrt{717}} = 0.1$

The lower end of the interval is the sample mean subtracted by M. So it is 18.5 - 0.1 = 18.4 gallons per day.

The upper end of the interval is the sample mean added to M. So it is 18.5 + 0.1 = 18.6 gallons per day.

The 80% confidence interval for the mean usage of water is between 18.4 and 18.6 gallons per day.

6 0

3 years ago

I climb half the steps in a staircase. Next, I climb one-third of the remaining steps. Then I climb one-eight of the rest and st

Natasha2012 [34]

Given parameters:

First sets of staircase = $\frac{1}{2}$

Next sets = $\frac{1}{3}$

Third sets = $\frac{1}{8}$

Unknown:

The least possible number of steps =?

Solution:

The least possible number of steps will be the lowest common multiples of these sets of steps.

We want fractions that will give whole numbers because realistically, one cannot take half a step of a step.

So, the number of steps must be a multiple of denominators of the fractions given.

Denominators are 2 , 3 and 8

Their least common multiple is 24;

This the lowest number by which 2, 3 and 8 can all divide.

So, the least number is 24 steps

7 0

3 years ago

Convert fraction 7/30 to a decimal value

Dmitry_Shevchenko [17]

You just simply divide 7 by 30. The answer would be 0.233333

3 0

3 years ago