All parabolas?
explanation:
The answers are: 4.5 g and 56.25 g respectively.
Since the first type of measurement in this question is weight or mass, I'll suppose that the percentage concentration is % mass/mass. For that type of concentration measurement, just multiply the percentage by the total mass to get the mass of the wanted material.
So 150 g * 3% = 150 g * 0.03 = 4.5g
For the 8% solution with the same amount of dry substance, use the ratio of percentages, multiplied by the mass of the first solution to get the wanted amount of new solution:
3/8 * 150 g = 56.35 g
Answer:
The 99% confidence interval for the mean amount of money spent on lunch per week for all college students is between $41.40 and $44.60.
Step-by-step explanation:
A confidence interval has two bounds, a lower bounds and an upper bound.
These bounds depend on the sample mean and the margin of error.
The lower bound is the sample mean subtracted by the margin of error.
The upper bound is the margin of error added to the sample mean.
In this problem, we have that:
The sample mean is $43.
The margin of error is $1.60 for a 99% confidence interval.
Lower bound: 43 - 1.60 = $41.40
Upper bound: 43 + 1.60 = $44.60
The 99% confidence interval for the mean amount of money spent on lunch per week for all college students is between $41.40 and $44.60.
Answer:
133.45
Step-by-step explanation:
They are looking for arc length. The formula is
* 2πr
a quarter circle is 90°, so put 90 for n. 85 is the radius, so put that for r.
* 2 π (85)
133.45
Answer:
$545.82
Step-by-step explanation:
Fomulas S=P(1+i)^n
given P=600
j=6%
m=12
t=10 yrs
find S=? Future value
i=j/m, i=(6/100)/12
n=m x t, n= 12x10--> n=120
S=P(1+i)^n
S=300x(1+0.06/12)^120
S=$545.82
