Answer:
The probability of a bulb lasting for between 480 and 526 hours=0.74454
Step-by-step explanation:
We are given that
Standard deviation of the lifetime,
hours
Mean,
hours
We have to find the probability of a bulb lasting for between 480 and 526 hours.





Hence, the probability of a bulb lasting for between 480 and 526 hours=0.74454
Answer:
6
Step-by-step explanation:
9/1 × 2/3
(9 × 2 = 18)
(1 × 3 = 3)
18 ÷ 3 = 6
Well, if you need to sell a hundred pizzas, then you had a 40% decrease
it would be something like this:
f(x) = 12 + x(4%)
but if you want it in y format then:
y = 12 + x(4%)