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2 years ago

3/4 pound of Colby cheese costs $1.69. Find the unit price per pound. (3/4 pound=12)

Mathematics

1 answer:

Liula [17]2 years ago

6 0

Answer:

2.25

Step-by-step explanation:

We can write a ratio to solve

1.69 x

------ = ---------------

3/4 lb 1 lb

Using cross products

1.69 * 1 = 3/4 *x

1.69 = 3/4 x

Multiply by 4/3

1.69 * 4/3 = x

x=2.25333

Rounding to the nearest cent

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Amy works for 36 hours per week for 10 weeks during the summer, making $\$3000$. If she works for 30 weeks during the school yea

Zinaida [17]

Answer:

12 hours per week

Step-by-step explanation:

1. Find how many hours she worked to make $3,000 (36x10=360 hours)

2. divide 360 hours by 30 weeks

she would need to work 12 hours per week to make $3,000

6 0

2 years ago

In the data set below, what is the interquartile range?

satela [25.4K]

Answer:

Step-by-step explanation:

To find the interquartile range (IQR), first find the median (middle value) of the lower and upper half of the data. These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.

3 0

1 year ago

One variable examined is the survival rate 10 years after tagging. The scientists observed that 10 of the 50 metal tagged pengui

Oksana_A [137]

Answer: 90% confidence interval would be $(-0.2483,-0.0717)$

Step-by-step explanation:

Since we have given that

n₁ = 50

Number of metal tagged penguins survived = 10

So, $p_m=\dfrac{10}{50}=0.2$

n₂ = 50

Number of electronic tagged penguins = 18

So, $p_e=\dfrac{18}{50}=0.36$

So, at 90% confidence interval, z = 1.28

So, interval would be

$(p_m-p_e)\pm z\sqrt{\dfrac{p_m(1-p_m)}{n}+\dfrac{p_e(1-p_e)}{n}}\\\\=(0.2-0.36)\pm 1.28\sqrt{\dfrac{0.2\times 0.8}{50}+\dfrac{0.36\times 0.64}{50}}\\\\=-0.16\pm 0.0883\\\\=(-0.16-0.0883,-0.16+0.0883)\\\\=(-0.2483,-0.0717)$

Hence, 90% confidence interval would be

$(-0.2483,-0.0717)$

6 0

2 years ago

A book that you want is 15$. You have a coupon for 5% off. How much will you pay?

Rzqust [24]

Answer:

$14.25

Step-by-step explanation:

15×5% = .75

15-.75 = 14.25

3 0

2 years ago

the height of a sycamore tree is 65ft . The height of a scale model of the tree is 1.625 ft . What is the scale of the model?

klasskru [66]

I think it’s 40. I could be wrong

4 0

2 years ago