Ask question

Ask question

All categories

3 years ago

15

Mr. william phisics class lasts 7/8 of an hour, 3/10 is used on arming up . How many minutes do they take to warm up..NOT FRACTI

ONS, minutes PLEASE HELP

1 answer:

pychu [463]3 years ago

5 0

7/8
3/10 of 7/8 means 3/10 times 7/8=21/80

1hour=60mins
60 times 21/80=1260/80=15.75

answer is 15.75 mins

You might be interested in

Divide.<br><br> 3/5 ÷ 1 1/4<br><br><br> A.) 1/4<br><br> B.) 12/25<br><br> C.) 3/4<br><br> D.) 2 2/5

daser333 [38]

Answer:

the answeer is d i got it right

Step-by-step explanation:

no need it d

6 0

2 years ago

The probability of drawing a heart from a standard deck of cards is 0.25. You record the car do you draw and return the car befo

Licemer1 [7]

Answer: C) 0.112

Step-by-step explanation:

In binomial distribution with parameters n (Total trails) and p (probability of getting success sin each trial) , the probability of getting success in x trials is given by :-

$P(X=x)=^nC_xp^x(1-p)^{n-x}$

Given : The probability of drawing a heart from a standard deck of cards is 0.25

Here , getting heart is the success.

Then p= 0.25

For n= 20

The probability that you will draw a heart seven times i.e. x= 7:

$P(X=7)=^{20}C_7(0.25)^7(1-0.25)^{20-7}$

$P(X=7)=\dfrac{20!}{7!(20-7)!}(0.25)^7(1-0.25)^{20-7}\ \ [\because\ ^nC_r=\dfrac{n!}{r!(n-r)!}]$

$=\dfrac{20\times19\times18\times17\times16\times15\times14\times13!}{7!13!}(0.25)^7(0.75)^{13}\\\\=77520(0.00006103515625)(0.0237572640181)\\\\=0.112406195476\approx0.112$

Hence, the probability that you will draw a heart seven times = 0.112

Thus , the correct answer is C) 0.112 .

8 0

3 years ago

For the data shown in the scatter plot, which is the best estimate of r? -0.95, -0.55, 0.55, 0.95

Liula [17]

From the data shown in the scater plots, the points are scattered apart which means that r is not close to 1.

Also the data points increase to the right which means that r is positive.

Therefore, the estimate for r in the data shown in the scatter plot is 0.55

6 0

3 years ago

How to simplify 5 to the power of 0

Dennis_Churaev [7]

Answer:

1

Step-by-step explanation:

Any positive integer to power of 0 will ALWAYS be 1.

7 0

3 years ago

The formula for finding the volume of a cone is V = 1/3πr2h. The volume of a cone is 300 cm3 and the height of the cone is 10 cm

stepladder [879]

The closest approximate answer would be B. 5cm

5 0

3 years ago