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2 years ago

Last month, he sold 50 chickens and 30 ducks for $550. This month, he sold 44chickens and 36 ducks for $532.

Mathematics

1 answer:

melisa1 [442]2 years ago

7 0

Answer: $5.00

Step-by-step explanation:

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A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic ca

Ugo [173]

Answer: A. 664

Step-by-step explanation:

Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.

But there is no information regarding the population proportion is mentioned.

Formula to find the samples size , if the prior estimate to the population proportion is unknown :

$n=0.25(\dfrac{z*}{E})^2$

, where E = Margin of error.

z* = Two -tailed critical z-value

We know that critical value for 99% confidence interval = $z*=2.576$ [By z-table]

Margin of error = 0.05

Then, the minimum sample size would become :

$n=0.25(\dfrac{2.576}{0.05})^2$

Simplify,

$n=0.25\times2654.3104=663.5776\approx664$

Thus, the required sample size= 664

Hence, the correct answer is A. 664.

5 0

3 years ago

Scarlet has $85 to spend at the pet store. She is definitely buying a catfish for $12, a rainbowfish for $13, and a betta fish f

ikadub [295]

Subtract the total of the 3 fish she is buying from the amount of money she has:

85 - (12 + 13 + 14) = 85 - 39 = 46

She has $46 to spend on crabs.

Divide the amount she has to spend by the price on one crab:

46 / 8 = 5.75

Since it isn't a whole number you need to round down, since she cant buy 0.75 of a crab.

She has enough money to buy 5 crabs.

7 0

2 years ago

A cell phone costs 120 dollars. The price reduced 30% for a sale. How much is the savings

Licemer1 [7]

Answer:

You save 36 dollars.

Step-by-step explanation:

30% of 120 is 36.

You spend $84

5 0

2 years ago

A right triangle ABC is shown below: The area of the triangle above will equal one-half of a rectangle that is 5 units long and

wlad13 [49]

Answer:

2 units wide. area=1/2 of 5 x 2. so, 5 x 2 is 10. whats half of ten? 5. the area of the triangle is 5

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Celrste's bank charges 2.35 for every time she uses the ATM celeste uses the ATM to withdraw 20 on Monday and to deposit 75 on T

saveliy_v [14]

After her transaction at the ATM, 52.65

7 0

2 years ago