Answer:
-5
Step-by-step explanation:
the opposite of plus 10 is negative so u add negative 10 to positve and do the same to 5
Answer:
u have to watch the videos so it can help u with the problem
Step-by-step explanation:
It will be easier if u watch them
18r^2 - 24r + 42. When you want to express something as squared or with an exponent you put ^ this symbol then the number(s)
Answer:
8/π
Step-by-step explanation:
Volume of the cylinder is:
V = πr²h
Surface area of the cylinder (with square top and bottom) is:
A = 2πrh + 8r²
Use the volume equation to write h in terms of r.
h = V / (πr²)
Substitute into the area equation:
A = 2V / r + 8r²
Take derivative with respect to r.
dA/dr = -2V / r² + 16r
Set to 0 and solve for r.
0 = -2V / r² + 16r
2V / r² = 16r
2V = 16r³
V = 8r³
Plug into the volume equation.
8r³ = πr²h
8r = πh
h / r = 8 / π
Answer: 0.1397 ; 0.385
Step-by-step explanation:
Given the following :
Small engine population = 45% ; 10% fail
Medium engine population = 35% ; 12% fail
Large engine population = 20% ; 15% fail
Probability that a randomly chosen car fails emission test :
P(failure) = Σ(population % * failure %)
P(failure) = (45%*10%) + (35%*12%) + (20%*15%)
P(failure) = 0.045 + 0.042 + 0.03 = 0.117
B) what is the probability it is a car with a small engine
P = small engine cars with emission failure / total emission failure
= (0.45 × 0.1) / 0.117 = 0.045 / 0.117 = 0.3846
= 0.385