Solve for y pleaseeee

Give some examples of real life situations in which you could use unit rates to solve an equivalent ratio problem

scoray [572]

- You buy a bunch of 12 bananas and pay $6 and want to know how much each banana costs.

- You pull into a gas station where the gas is $2.50 a gallon. You want to know how much you would need to fill up your 35 gallon tank.

- You drove 300 miles to visit your cousin in another state. It takes you 4 hours. You want to know how many miles you drove per hour.

4 0

3 years ago

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. Ho

prisoha [69]

Answer:

96

Step-by-step explanation:

Step 1

Divide your confidence interval by 2. In this case the confidence is 95% = 0.095, so 0.095/2 = 0.0475

Step 2

Use either a z-score table or a computer to find the closest z-score for 0.0475 and you will find this value is 1.96

Step 3

Divide the margin error by 2. In this case, the margin error is 2%. When dividing this figure by 2, we get 1% = 0.01

Step 4

Divide the number obtained in Step 2 by the number obtained in Step 3 and square it

1.96/0.01 = 196 and 196 squared is 38,416

Step 5

As we do not now a proportion of people that purchase on line, we must assume this value is 50% = 0.5. Square this number and you get 0.25

Step 6

Multiply the number obtained in Step 5 by the number obtained in Step 4, round it to the nearest integer and this is an appropriate size of the sample.

38,416*0.25 = 9,604

6 0

4 years ago

The average commute time to work (one way) is 25 minutes according to the 2005 american community survey. if we assume that comm

brilliants [131]

Given that the average commute time to work (one way) is 25 minutes according to the 2005 american community survey. if we assume that commute times are normally distributed and that the standard deviation is 6.1 minutes, what is the probability that a randomly selected commuter spends less than 18 minutes commuting one way

The probability that a randomly selected number from a normally distributed dataset with a mean of μ and a standard deviation of σ is less than a value, x, is given by:

 $P(X\ \textless \ x)=P\left(z\ \textless \ \frac{x-\mu}{\sigma} \right)$

Given that the average commute time to work (one way) is 25 minutes and that the standard deviation is 6.1 minutes,

the probability that a randomly selected commuter spends less than 18 minutes commuting one way is given by:

$P(X\ \textless \ 18)=P\left(z\ \textless \ \frac{18-25}{6.1} \right) \\ \\ =P(z\ \textless \ -1.148)=\bold{0.1256}$

3 0

4 years ago

 A red candle is 115 inches tall. The label claims that the candle will melt 1 1/8 inch every hour it burns. If the label is

OverLord2011 [107]

This question is pretty simple!

All you need to do is divide 115 by 1 1/8 or 1.125

And your answer should be 102.22

So you can round this to 102 hours. :D

6 0

3 years ago

Find the y-intercept - 74 - 7y = -7%

harkovskaia [24]

Answer: -75

Step-by-step explanation:

3 0

3 years ago