All categories

3 years ago

Frank started practicing his trumpet at 4:30 pm and finished at 6:00 pm. How long did he practice?

Mathematics

1 answer:

scoundrel [369]3 years ago

8 0

Answer:

Step-by-step explanation:

4:30 pm can be also expressed as 16:30, while 6:00 pm can be expressed as 18:00. The difference between them is 01:30, therefore the answer is D, 1 hour and 30 minutes.

You might be interested in

a car travels 54.9 miles in an hour. if the car continues at the same speed for 12hours,how many miles will it travel

Ilia_Sergeevich [38]

Here's what you have to do: multiply. 54.9×12= 658.8. So, he traveled 658.8 miles in twelve hours.

7 0

3 years ago

The proportion of items in a population that possess a specific attribute is known to be 0.45. a. If a simple random sample of s

yanalaym [24]

Answer: 0.05

Step-by-step explanation:

Sampling error is the error occurs by considering sample for study instead of entire population.

Given : The proportion of items in a population that possess a specific attribute is known to be 0.45.

Sample size : n= 100

Sample proportion of items in a population that possess a specific attribute : $\hat{p}=0.48$

Now, the formula to find the sampling error :

$\text{Sampling error} =\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$\text{Sampling error} =\sqrt{\dfrac{0.48(1-0.48)}{100}}$

$=\sqrt{\dfrac{0.48(0.52)}{100}}\\\\=\sqrt{0.002496}\approx0.05$

Hence, the sampling error =0.05

4 0

2 years ago

Find the product of 2x2 + 3x - 6 and 4x3 - x + 7.

yanalaym [24]

Answer:

8x^5 + 12x^4 - 26^3 + 11x^2 + 27x - 42

Step-by-step explanation:

(2x^2 + 3x - 6)(4x^3 - x + 7)

8x^5 -2x^3 +14x^2 + 12x^4 - 3x^2 + 21x -24x^3 + 6x - 42

8x^5 + 12x^4 - 26^3 + 11x^2 + 27x - 42

5 0

2 years ago

For which value of x is the equation 3(3 + x) = 15 + x true?

seraphim [82]

Answer:

x=3

Step-by-step explanation:

3(3 + x)=15+x

distribute

9 + 3x= 15+x

subtract x from each side

9+3x-x = 15

9+2x = 15

subtract 9 from each side

9+2x-9 = 15-9

2x = 6

divide by 2

2x/2 = 6/2

x=3

7 0

2 years ago

Read 2 more answers

Matching 1. protects against loss from automobile accidents of insured malpractice 2. protects against loss to insured's home an

Brums [2.3K]

2 Homeowners'
6 Life
3 Fire
4 Liability
5 Malpractice
1 Automobile

7 0

2 years ago

Read 2 more answers