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Dahasolnce [82]
2 years ago
7

LE

Mathematics
1 answer:
Gekata [30.6K]2 years ago
6 0

este firie be fine

Step-by-step explanation:

20×3=60

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for every 30 minutes of TV air time there are 8 minutes of commercial. If 90 minutes of TV or are now how many how many minutes
Anna35 [415]

Let m = minutes of commercial


30/90 = 8/m


Solve for m.


90(8) = 30m


720 = 30m


720/30 = m


24 = m

7 0
3 years ago
Read 2 more answers
A polling organization asked a nation-wide random sample of 1600 new brides (those who got married in the past 2 years) the foll
iren [92.7K]

Answer:

It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively.

Step-by-step explanation:

Given that:

sample size n = 1600

sample mean \overline x = 20000

standard deviation = 5000

The objective is to choose from the given option about what most closely resembles the relevant box model.

The correct answer is:

It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively.

However, if draws are made without replacement, the best estimate of the average amount for the bride will be $20,000

Similarly, the standard error for the sample mean = \dfrac{s}{\sqrt{n}}

= \dfrac{5000}{\sqrt{1600}}

= \dfrac{5000}{40}}

the standard error for the sample mean = 125

4 0
3 years ago
Please anybody help me with this question
inn [45]

Answer:

y = 12

Step-by-step explanation:

Divide both by 1/4

x = 1 when y = 32/3

When x = 1 1/8 = 9/8

y = 32/3 x 9/8

y = 12

6 0
3 years ago
How much interest is earned in 2 years on an investment of $2000? The interest rate is 3%
erik [133]
Answer:
A = $ 2,120.00

Equation:
A = P(1 + rt)
Calculation:
First, converting R percent to r a decimal
r = R/100 = 3%/100 = 0.03 per year,
then, solving our equation

A = 2000(1 + (0.03 × 2)) = 2120 
A = $ 2,120.00

The total amount accrued, principal plus interest,
from simple interest on a principal of $ 2,000.00
at a rate of 3% per year
for 2 years is $ 2,120.00.
6 0
3 years ago
Solve each two step problem.
KatRina [158]
That will be 295.25 how ?? You multiply 8.75 by 40 then subtract 55.75 =295.25
7 0
2 years ago
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