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tekilochka [14]
3 years ago
15

A plumber charges $65 for a diagnostic check. After the check, it is $85 per hour for the work. With $320 in your wallet, how ma

ny hours of Work can you afford?​
Mathematics
1 answer:
Katarina [22]3 years ago
6 0

Answer:

3 hours

Step-by-step explanation:

first, you subtract 65 from 320 to cover the diagnostic check.

Then, you subtract 85 from the remaining cash three times and you'll get 0

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The standard deviation of a particular sample is equal to the standard deviation divided by the square root of the sample size.  That is,\sigma_x=\frac{\sigma}{\sqrt n}
The mean of a particular sample is equal to the mean of the set the sample was taken from.  That is,
\mu_x=\mu
\text{In your case, }\sigma_x=\frac{9}{\sqrt4}=\frac92\text{ and }\mu_x=45.
4 0
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Robert finished the race 20 seconds before Tom. Tom finished the race in 95 seconds. Which expression shows the number of second
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Answer: If Tom finished the race in 95 seconds and Robert finished 20 seconds before Tom, Robert finished in 75 seconds.

The expression that shows this is 95-20=75.

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3 years ago
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Step-by-step explanation:

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2 years ago
TRUE or FALSE: Every number raised to a negative exponent will have a value smaller than 1. Explain your reasoning.
Sveta_85 [38]

Answer:

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

Every number raised to a negative exponent will have a value smaller than 1.

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5 0
3 years ago
A label reads: “Gantrisin. 1.5 g in 20 mL. “ how many milliliters are needed to give10.5 g of Gantrisin?
Tomtit [17]

Answer:

140 ml is needed to give 10.5g of Gantrisin

Step-by-step explanation:

In this question, we are asked to calculate how many milliliters liters will give a certain mass of Gantrisin.

Firstly, from the first values given, we can calculate the value if the density of the liquid.

Mathematically, the value of the density can be calculated by ;

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Now for the second part of the question, we have the mass, but we do not know the volume. We can use the calculated density to know this.

We use the formula

volume = mass/density

Volume = 10.5g/(0.075g/ml)

Volume = 140 ml

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3 years ago
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