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astraxan [27]
4 years ago
9

If something cost 15$ and he wants to tip 20% how much would it be

Mathematics
2 answers:
ANTONII [103]4 years ago
7 0
The answer to your question would be $18
Ivahew [28]4 years ago
5 0
$18 would be the answer because 20% is equal to 3 and then you add 15
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A father decided to give twenty five percent of his monthly income to his three children as their monthly allowance. The eldest
Helen [10]

Answer:

The youngest child will receive $2000

Step-by-step explanation:

A father decided to give 25% of his monthly income to his three children as their monthly allowance.

The eldest child got 45% of the allowance and the youngest got 20%. This means that the second child got:

100 - (45 + 20) = 100 - 65 = 35%

The second child received $3500.

Let the 25% of his monthly income be x.

Hence:

35% of x = 3500

=> \frac{35}{100} * x = 3500

x = \frac{3500 * 100}{35}

x = $10000

The amount the man shared among his children is $10000.

Hence, the youngest child (20%) will receive:

20% of $10000

\frac{20}{100} * 10000

= $2000

The youngest child will receive $2000.

3 0
3 years ago
Determine the sample size needed to construct a 99​% confidence interval to estimate the average GPA for the student population
Volgvan

Answer: n = 14

Step-by-step explanation: margin of error = critical value × σ/√n

Where σ = population standard deviation = 1

n = sample size = ?

We are to construct a 99% confidence interval, hence the level of significance is 1%.

The critical value for 2 tailed test at 1% level of significance is gotten from a standard normal distribution table which is 2.58

Margin of error = 0.7

0.7 = 2.58×1/√n

0.7 = 2.58/√n

By cross multipying

0.7×√n = 2.58

By squaring both sides

0.7^2 × n = 2.58^2

0.49 × n = 6.6564

n = 6.6564/0.49

n = 14

3 0
4 years ago
Describe the additive inverse of a vector in the vector space.
Step2247 [10]
I dont know what you mean by describe but the inverse is -v
6 0
4 years ago
25 mice were involved in a biology experiment involving exposure to chemicals found in ciggarette smoke. 15 developed at least 1
Vaselesa [24]

The number of mice that didn't get a tumor is 9 mice out of the 25 mice.

<h3>How to know how many mice didn't have a tumor?</h3>

Identify the total mice who did not have any effects or the effects did not include a tumor.

Repiratory failure: 9 mice

Based on this, it can be concluded 9 mice did not have a tumor, while 21 mice hat at least a tumor and some of them had a tumor and respiratory failure.

Note: This question is incomplete; here is the missing section:

  • How many didn't get a tumor?

Learn more about mices in: brainly.com/question/20662365

#SPJ1

3 0
2 years ago
Which of the following is fartherest to the left on a number line 1/5, (0.1)to second power, 0.02
Alexxx [7]
1/5 is .2
.1^2 is .01
.02 is .02

So the furthest left  would be the smallest number, which in this case is 0.1^2
5 0
4 years ago
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