Answer:
It’s the last one
Step-by-step explanation:
Answer:
w≅8.46ft
Step-by-step explanation:
Data
focus=8
vertex=(0,0)
width=?
depth (y)=3ft
parabola equation:
; then for V=(0,0),
, be focus(f)=8in;
→ 
we have that y=3ft then
; but 1in≅0.083ft so
→ x=±2.82, finally w=3*2.82≅8.46ft
Answer: There is 400 grams of medication that should the feed company ad for each ton of food they produce.
Step-by-step explanation:
Since we have given that
Quantity of medication each country need a day = 300 mg
Number of pounds per day consumes by each cow = 15 pounds
So, it becomes

As we know that
1 g = 1000 mg
So, 20 mg = 
Total number of pounds = 2000 pounds
So, number of grams of medication that should the feed company ad for each ton of food they produce is given by

Hence, there is 400 grams of medication that should the feed company ad for each ton of food they produce.
Answer:
We conclude that average reflectometer reading for a new type of paint is greater than 20
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 20
Sample size, n = 13
Alpha, α = 0.05
First, we design the null and the alternate hypothesis
Formula:
Degree of freedom = n - 1 = 13 - 1 = 12
Now, we calculate the p-value with the help of standard table.
P-value = 0.004
Since, the p-value is less than the significance level, we fail to accept the null hypothesis and reject it.
Thus, there is enough evidence to support that average reflectometer reading for a new type of paint is greater than 20