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mariarad [96]
3 years ago
15

Tessa takes her friends out to lunch and the total cost of the meal is $120.30. Tessa left a 20% tip for the waitress. How much

money did Tessa give to the waitress as a tip
Mathematics
1 answer:
Naddika [18.5K]3 years ago
4 0

Answer:

$24.06

Step-by-step explanation:

20%(120.30) = 0.2*120.3 = $24.06

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Area of right angle triangle is 54 cm2. if one of its leg is 12 cm fine the perimeter
Molodets [167]
The perimeter of the right angled triangle should be 36cm, hope this helps:)
8 0
3 years ago
Which of the following equations matches the graph above?
Ierofanga [76]
Yes , I agree w them I’m gonna go with the answer D.
3 0
3 years ago
For the given hypothesis test, determine the probability of a Type II error or the power, as specified. A hypothesis test is to
erica [24]

Answer:

the probability of a Type II error if in fact the mean waiting time u, is 9.8 minutes is 0.1251

Option A) is the correct answer.

Step-by-step explanation:

Given the data in the question;

we know that a type 11 error occur when a null hypothesis is false and we fail to reject it.

as in it in the question;

obtained mean is 9.8 which is obviously not equal to 8.3

But still we fail to reject the null hypothesis says mean is 8.3

Hence we have to find the probability of type 11 error

given that; it is right tailed and o.5, it corresponds to 1.645

so

z is equal to 1.645

z = (x-μ)/\frac{S}{\sqrt{n} }

where our standard deviation s = 3.8

sample size n = 50

mean μ = 8.3

we substitute

1.645 = (x - 8.3)/\frac{3.8}{\sqrt{50} }

1.645 = (x - 8.3) / 0.5374

0.884023 = x - 8.3

x = 0.884023 + 8.3

x = 9.18402

so, by general rule we will fail to reject the null hypothesis when we will get the z value less than 1.645

As we reject the null hypothesis for right tailed test when the obtained test statistics is greater than the critical value

so, we will fail to reject the null hypothesis as long as we get the sample mean less than 9.18402

Now, for mean 9.8 and standard deviation 3.8 and sample size 50

Z =  (9.18402 - 9.8)/\frac{3.8}{\sqrt{50} }

Z = -0.61598 / 0.5374

Z = - 1.1462 ≈ - 1.15

from the z-score table;

P(z<-1.15) = 0.1251

Therefore, the probability of a Type II error if in fact the mean waiting time u, is 9.8 minutes is 0.1251

Option A) is the correct answer.

8 0
3 years ago
Please help this is due in 10 minutes!!!
Mandarinka [93]

Answer:

3053.63 un³

Step-by-step explanation:

Hello!

The diameter is 18, so the radius is half of the diameter, or 9.

Using the volume of a sphere formula: \frac43\pi r^3

Solve:

  • \frac43\pi r^3
  • \frac43\pi *9^3
  • \frac43*729\pi
  • 972\pi
  • 3,053.6280592893 ≈ 3,053.63

The volume is 3053.63 un³.

7 0
2 years ago
1. A coin is tossed and a single die is rolled. What is the theoretical
Vera_Pavlovna [14]

Answer:

A

Step-by-step explanation:

The chance the coin will show 'tails' is 1/2, since there are only 2 sides to a coin. The chance that the die will show an even number is also 1/2, since half of the numbers on a die are even, and half are odd. But, since both of these events depend on each other, or in other words, are dependent, we have to multiply both numbers. 1/2 x 1/2 = 1/4, therefore your answer is A.

5 0
2 years ago
Read 2 more answers
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