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Murrr4er [49]
3 years ago
7

Alan has to finish an exam within 120 minutes. He finished the exam in 80 minutes. What is the percentage of the time he took fo

r exam?
Mathematics
1 answer:
drek231 [11]3 years ago
7 0

Answer:

66.67%

Step-by-step explanation:

80/120 = 66.67

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A manufacturing process makes rods that vary slightly in length but follow a normal distribution with mean length 25 cm and stan
Galina-37 [17]

Answer:

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22)  = 0.1251

Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given mean of the Population = 25cm

Given standard deviation of the Population = 2.60

Let 'x' be the random variable in normal distribution

Given x=22

Z = \frac{x-mean }{S.D} = \frac{22-25}{2.60} = -1.15

<u><em>Step(ii):</em></u>-

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22) = P( Z<-1.15)

             = 1-P(Z>1.15)

             =  1-( 0.5+A(1.15)

             =  0.5 - A(1.15)

             = 0.5 - 0.3749

             = 0.1251

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22)  = 0.1251

7 0
3 years ago
QUICK PLEASE!!<br><br> -5.6 = h/5 + 12.2<br> show steps!
BaLLatris [955]

Answer: h = 89

Step-by-step explanation:  Hope correct :)

3 0
3 years ago
Read 2 more answers
Are the given lengths 24, 60, 66, sides of a right triangle?
GarryVolchara [31]


24+60=84>66

60+66=126>24

66+24=90>60


Therefore, the lengths are the sides of a triangle because the sum of lengths of two sides must be greater than the third side. All the sum of length of 2 sides are greater than the third side.

5 0
3 years ago
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Three times a number is no less than negative six.
tresset_1 [31]

the equation for the stated problem would be:

3x ≥ -6

3 0
3 years ago
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You plan to purchase a bike costing $795. write an equation that could be used to find the amount m, that you must save per mont
Galina-37 [17]
Let
m-------> <span>the amount that you must save per month

we know that
total cost of a bike=$795
5*m=795----------> equation </span><span>that could be used to find the amount m
divide by 5 both sides
m=795/5
m=$159

the answer is
</span>the equation that could be used to find the amount m is
<span>5m=795

</span>
6 0
3 years ago
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