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svet-max [94.6K]
3 years ago
14

Mr. Ramirez gave his class

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
6 0

Answer:

38 pages per hour

Step-by-step explanation:

Rate of reading = \frac{\text{Total number of pages read by Davida}}{\text{Time taken to read}}

By substituting the given values in the question,

Total number of pages read by Davida = 28\frac{1}{2} = \frac{57}{2}

Time taken by Davida = 45 minutes

Since, 1 minute = \frac{1}{60} hours

Therefore, 45 minutes = \frac{45}{60}=\frac{3}{4} hours

Rate of reading = \frac{\frac{57}{2}}{\frac{3}{4} }

                          = \frac{57}{2}\times \frac{4}{3}

                          = 38 pages per hour

Therefore, rate of reading by Davida is 38 pages per hour.

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Round 630,379,982 to the nearest hundred thousand
mamaluj [8]

Answer:

630,400,000

Step-by-step explanation:

630,379,982

The 3 above that is bold, between the 0 and the 7, is in the hundred thousands place.

To round to a place, change all digits to the right of that place to zero. If the digit immediately to the right is 0 through 4, you're done. If the digit immediately to the right is from 5 to 9, then you raise the digit you are rounding to by 1.

Step 1. Make all digits to the right of the hundred thousands digit 0.

630,300,000

Step 2. Since the digit immediately to the right of the hundred thousands digit was a 7, which is from 5 to 9, the digit we are rounding to goes up by 1. The 3 becomes 4.

630,400,000

Answer: 630,400,000

5 0
3 years ago
Read 2 more answers
The sum of two numbers is 46 . the larger number is 12 more than the smaller number. what are the numbers?
snow_tiger [21]
X + y = 46
x = y + 12

y + 12 + y = 46
2y + 12 = 46
2y = 46 - 12
2y = 34
y = 34/2
y = 17

x = y + 12
x = 17 + 12
x = 29

so ur 2 numbers are : 29 and 17
4 0
3 years ago
Read 2 more answers
A rental car agency charges $12 per day plus 14 cents per mile to rent a certain car. Another agency charges $15
Sav [38]

Answer:

The cost of renting will be the same for 200 miles.

Step-by-step explanation:

Let n the number of miles and C be the cost. We can represent the cost equations for each companies:

A: C = 12 + 0.09n

B: C = 8 + 0.11n

They want to know when the cost will be the same, so we can set the above 2 equations equal to each other and solve for n:

12 + 0.09n = 8 + 0.11n

0.02n = 4

n = 200

3 0
2 years ago
Find the union and interesection of each of the following A={3,6,9,12}, B ={6,8,9}
Archy [21]

Answer:

Hello,

The answer would be,

A union B = {3,6,9,12}

and A intersection B= {6,9}

4 0
2 years ago
Read 2 more answers
Please help on this asap
Lelechka [254]
I believe that would be the last choice, because it is not impossible that someone without contacts or glasses would be chosen.  And it is a fairly similar chance that someone with glasses or with contacts will be chosen.  Hope this helps! :)
7 0
3 years ago
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