What is the cost of the bill if a drink costs $3, a meal costs $20, an appetizer costs $5.50 and a slice of cake cost $3. 75?

the cost of a phone call lasting 3 minutes 30 seconds was 52.5 cents . at this rate what was the cost of a call lasting 5 minute

Effectus [21]

Answer:

80 cents

Step-by-step explanation:

The easiest place to start for this is to calculate how much it costs per minute of call time. To do this, if we know that it costs 52.5 cents to call for 3.5 minutes, we can divide those two numbers to get how much it costs per minute.

52.5/3.5 = 15

If it costs 15 cents per minute, and we want to know how much it would cost to call for 5.33 (5 and 1/3 of a minute), then we multiply our 15 cents a minute by the number of minutes to get the final cost.

15 x 5.33 = 79.99

Because we can't have 99/100 cents, rounding up to 80 is important to get a proper answer.

6 0

3 years ago

Suppose you are making a model where one block represents 5 feet. About how many blocks tall is your model of the Empire State B

Ymorist [56]

Answer:
250 blocks

Scale factor:

Explanation:
1,250/5=250

3 0

2 years ago

Fast Food and Gas Stations Forty percent of all Americans who travel by car look for gas stations and food outlets that are clos

Andrei [34K]

Answer:

a

mean $\mu = 10$ variance $\sigma^2 = 6$

b

The binomial random variable x fall into this interval ranges from

- 5 to 5

c

$P(6 \le x \le 14) = 0.8969$

Step-by-step explanation:

From the question we are told that

The sample size is $n = 25$

The percentage that look for gas stations and food outlets that are close to or visible from the highway is $p = 0.40$

Generally the mean is mathematically represented as

$\mu = n * p$

=> $\mu = 0.40 * 25$

=> $\mu = 10$

The variance is mathematically represented as

$\sigma^2 = np(1- p )$

=> $\sigma^2 = 25 * 0.40(1- 0.40 )$

=> $\sigma^2 = 6$

The standard deviation is mathematically evaluated as

$\sigma = \sqrt{\sigma^2}$

$\sigma = \sqrt{6}$

$\sigma = 2.45$

The interval is evaluated as

$p\pm 2 \sigma$

=> $p - 2 \sigma\ \ \ , \ \ \ p + 2\sigma$

=> $0.40 - 2 *2.45\ \ \ , \ \ \ 0.40 + 2* 2.45$

=> $-4.5\ \ \ , \ \ \ 5.3$

The binomial random variable x fall into this interval ranges from

- 5 to 5

Generally

$P(6 \le x \le 14) = P(\frac{ x - \mu }{\sigma } \le \frac{14 - 10}{{2.45}} ]-P[ \frac{ x - \mu }{\sigma } \le \frac{6 - 10}{2.45 } ]$

$P(6 \le x \le 14) = P(Z \le 1.63 ]-P[ Z \le -1.63 ]$

$P(6 \le x \le 14) = [1- P(Z > 1.63 ]] -[1- P[ Z > -1.63 ]]$

From the z-table

$P(Z > 1.63 ) = 0.051551$

And

$P(Z >- 1.63 ) =0.94845$

=> $P(6 \le x \le 14) = [1-0.051551] -[1-0.94845]$

=> $P(6 \le x \le 14) = 0.8969$

7 0

2 years ago

Numbers x and y both squared and added <br><br>And ASAP pls<br><br>Nira here :)

Over [174]

Answer:

2x² + 4y²

according to your given information.......

3 0

1 year ago

Explain how to find 398 + 257 with mental math and with the standard algorithm.

klasskru [66]

Step-by-step explanation:

If you were to round 398 to the nearest hundred, you would get 400. that's only 2 off of 398. when you add 400 + 257 that would equal 857 because 4 + 2= 6 and then the other two digits on 400 are zeros so 5 and 7 stay the same. with 857, you must now subtract 2 because you added 2 earlier. 857 - 2 = 855.

4 0

2 years ago

What is the cost of the bill if a drink costs $3, a meal costs $20, an appetizer costs $5.50 and a slice of cake cost $3. 75?​

What is the cost of the bill if a drink costs $3, a meal costs $20, an appetizer costs $5.50 and a slice of cake cost $3. 75?