800 ones equal how many hundreds

Stephanie has a $40 balance on her credit card. She makes two additional charges to pay $20 for gas and $25 for parking. Then sh

nikdorinn [45]

Answer:

She should have $25 left

Step-by-step explanation:

It she has a total of $40 and you take away the $20 she spent of gas and the $25 she spent for parking she would have -$5 but since she paid $30 back on the card she has a balance of $25

7 0

2 years ago

Read 2 more answers

Fifty percent of the surface area of the bread is crust. What is the height h?

Vikentia [17]

Answer:

The height h is $5\ cm$

Step-by-step explanation:

we know that

The surface area of the bread is equal to

$SA=2B+Ph\\$

where

B is the area of the base

P is the perimeter of the base

h is the height

In this problem

If fifty percent of the surface area of the bread is crust

then

$2B=Ph\\$

substitute the values

$2(10)(10)=4(10)h\\$

$200=40h\\$

$h=200/40=5\ cm$

5 0

2 years ago

Yuto and Lian are at train stations 1,880 kilometers apart. Yuto boards a train heading east at an average speed of 220 kilomete

lys-0071 [83]

<span>the correct answer is
D) 1000 kilometers </span>

5 0

2 years ago

The highest recorded temperature during the month of July for a given year in Death Valley, California has an approximately norm

S_A_V [24]

Answer:

$P(X$

And we can find this probability using excel or the normal standard tabe and we got:

$P(z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the temperatures of a population, and for this case we know the distribution for X is given by:

$X \sim N(123.8,3.1)$