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never [62]
3 years ago
12

tina practiced piano for 15 hours last month and 45 hours this month. using addition to write a statement comparing the hours ti

na practiced during the two months
Mathematics
1 answer:
Kipish [7]3 years ago
3 0
She practiced piano for 60 hours
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The student body of a large university consists of 60% female students. A random sample of 8 students is selected. Refer to Exhi
jasenka [17]

Answer:

0.0499

Step-by-step explanation:

This is a binomial probability  function expressed as:

P(X=x)={n\choose x}p^x(1-p)^{n-x}\\\\

Given that n =8, and p(male)=1-0.6=0.4, the probability of at least 6 being male is calculated as:

P(X=x)={n\choose x}p^x(1-p)^{n-x}\\\\P(X\geq 6)=P(X=6)+P(X=7)+P(X=8)\\\\={8\choose 6}0.4^6(0.6)^{2}+{8\choose 7}0.4^7(0.6)^{1}+{8\choose 8}0.4^8(0.6)^{0}\\\\=0.0413+0.0079+0.0007\\\\=0.0499

Hence, the probability of at least 6 males is 0.0499

8 0
3 years ago
I need help in this question please
stepan [7]
The whole wall area including the window is 150 ft squared (15 ft x 10 ft). The window is 50 square feet (5 x 10). Take the whole area and subtract the window area and you have 100 sq ft thats paintable. One can is 50 sq ft so 100/50 is 2 cans of paint needed. Your answer is H.
4 0
3 years ago
Please help 6th grade math :)
Drupady [299]
I think the answer would be D
4 0
3 years ago
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Lisa paid 43.95 for 16.1 gallon of gasoline. What was that cost per gallon rounded to the nearest hundredth
djverab [1.8K]

Answer:

2.73

Step-by-step explanation:

It is given that Lisa paid 43.95 for 16.1 gallons of gasoline.

So, the cost of 16.1 gallons of gasoline is 43.95.

Hence, the cost of gasoline per gallon is 43.95/16.1 = 2.7304347.

Now, it is required to round this value to the nearest hundredth.

Therefore, the cost of gasoline per gallon rounded to the nearest hundredth is 2.73. (Answer)

3 0
3 years ago
The length of a rectangle is 3 inches greater than the width.
kati45 [8]

Answer:

A - x (x+3) = Area of the rectangle

B- 28 inches squared

Step-by-step explanation:

B- using the formula from A

x = 4

x + 3 = 4 +3 = 7

4 times 7 is 28

4 0
3 years ago
Read 2 more answers
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