Answer:
A = 176/15
B = 1/19
C = -1
D = - 1/48
E = 80/17
F = - 1/10
Step-by-step explanation:
A) -4/3 x (-75-13)/10
(-4/3) x (-88/10) = 176/15
B) 4/19 - 12/19 + 9/19 = (4 - 12 +9)/19
= 1/19
C) -6/5- (3/34)/(-15/34)
-6/5 - (-1/5)
-6/5 + 1/5 = -1
D) (3/10) x (5/18) = 15/180 = 1/12
(1/16) - (1/12) = - 1/48
E) (3/32) - (1/32) = 2/32 = 1/16
(5/17) / (1/16) = 80/17
F) (4/20) x (12/8) x (-5/15) = - 240/2400 = - 1/10
It’s -3 repeating and there is the work your welcome child
Answer: the probability of a bulb lasting for at most 552 hours is 0.953.
Step-by-step explanation:
Since the life of light bulbs are distributed normally, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = the life of light bulbs in hours.
µ = mean hour
σ = standard deviation
From the information given,
µ = 510 hours
σ = 25 hours
We want to find the probability of a bulb lasting for at most 552 hours. It is expressed as
P(x ≤ 552)
For x = 552
z = (552 - 510)/25 = 1.68
Looking at the normal distribution table, the probability corresponding to the z score is 0.953
Answer:
8
Step-by-step explanation:
covert 8.4 into a fraction which would be 42/5
then subtract 42/5 from 2/5 and youll get 8
The profit he made from selling his hearing aids at a profit of 17% is $234.26.
<h3>How to calculate the profit obtained?</h3>
To calculate the profit obtained, we must calculate how much money is equal to 17% of $1,378.
- $1,378 ÷ 100 = $13.78
- $13.78 × 17 = $234.26
Based on the above, 17% of $1,378 equals $234.26. On the other hand, to calculate the final sale price of the earphone, we add the initial value plus the value of the profit.
$1,378 + $234.26 = $1,612.26
Learn more about profit in: brainly.com/question/15293328