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2 years ago

Lucky's Market purchased a new freezer for the store.

Mathematics

2 answers:

Kitty [74]2 years ago

8 0

Answer: The rate of change is 2/3 Fahrenheit per minute

Step-by-step explanation:

Let's say x is the number of minutes and y is the temperature.Now we could set up a proportion to solve for the temperature for every per minute.

$\frac{15}{1} = \frac{10}{x}$

15x = 10

x = $\frac{10}{15}$

x = $\frac{2}{3}$

Luda [366]2 years ago

5 0

Answer:

1/3 degreees/min

Step-by-step explanation:

In 15 min, temp. rises by 10 degrees

This means that 10 degrees / 15 min = 2 deg / 3 min

1/3 degree/min

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Freddie put an empty bucket underneath a leaking pipe. After 3/4 hours, Freddie collected 1/2 cups of water. What is the rate, i

lidiya [134]

0.35 cups/hour

To be able to determine the rate at which the water is leaking from the pipe with the information given, you have to divide the number of cups by the number of hours in which they were collected:
12 cups/34 hours= 0.35 cups/hour
According to this, the answer is that the rate at which the water is leaking from the pipe is 0.35 cups/hour.

Hope this helps!!

5 0

2 years ago

Solve and simplify: x(x - 1) = 121 – x

GuDViN [60]

Answer:

$x=11$

Step-by-step explanation:

$x(x-1)=121-x\\\\x^2-x=121-x\\\\x^2=121\\\\x=\sqrt{121}\\\\x=11$

3 0

2 years ago

Read 2 more answers

The graph shows the increase in temperature over time in an oven. What is the change in the y-values and x-values on the graph?

iren2701 [21]

Answer:

Step-by-step explanation:

graph is not provided

8 0

2 years ago

A person recently read that 84% of cat owners are women. How large a sample should the researcher take if she wishes to be 90% c

Lana71 [14]

Answer:

405

Step-by-step explanation:

To find sample size, use the following equation, where n = sample size, za/2 = the critical value, p = probability of success, q = probability of failure, and E = margin of error.

$n=\frac{(z_{\frac{\alpha }{2} })^{2} *p*q }{E^2}$

The values that are given are p = 0.84 and E = 0.03.

You can solve for the critical value which is equal to the z-score of (1 - confidence level)/2. Use the calculator function of invNorm to find the z-score. The value will given with a negative sign, but you can ignore that.

(1 - 0.9) = 0.1/2 = 0.05

invNorm(0.05, 0, 1) = 1.645

You can also solve for q which is 1 - p. For this problem q = 1 - 0.84 = 0.16

Plug the values into the equation and solve for n.

$n =\frac{(1.645)^2*0.84*0.16}{(0.03)^2}\\n= 404.0997333$