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2 years ago

A math teacher graded 45 problems in 3/5 of an hour. At that rate, how many problems can she grade in 1 hour?

Mathematics

2 answers:

ankoles [38]2 years ago

7 0

Answer:

75 questions

Step-by-step explanation:

$45$ ÷ $\frac{3}{5}$ of an hour

$\frac{3}{5} =36$

$45$ ÷ $36$ minutes

= 1.25

1.25 times 60 = 75 questions

Maurinko [17]2 years ago

3 0

Answer:

Step-by-step explanation:

3/5 = 60% so when you have 2/5 left it is 40% which is 2/3 of 45 and that is 30 problems a hour

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Express 0.0057 in scientific notation

andrew-mc [135]

Answer:

$5.7 \times {10}^{ - 3}$

Step-by-step explanation:

0.0057

first number

then the rest

equal

5.7

There's three zeros behind the number 5 which mean it will be -3

$\times {10}^{ - 3}$

final answer

$5.7 \times {10}^{ - 3}$

another example and it will be clear

0.0000403

first number

then the rest

equal

4.03

There's five zeros behind the number 4 which mean it will be -5

$\times {10}^{ - 5}$

final answer

$4.03 \times {10}^{ - 5}$

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3 years ago

For a school fundraiser, Elena will make pirate masks. She will order masks and print graphics on them. Elena must spend $349 on

SpyIntel [72]

Answer:

135 masks

Step-by-step explanation:

i hope my math is right lol

6 0

1 year ago

Read 2 more answers

Which equation has the least steep graph?

MAVERICK [17]

Answer:

$y=\frac{1}{4}x+6$

Step-by-step explanation:

$y=\frac{1}{4}x+6$ is the least steeped graph

The greater the slope, the steeper the line.
Also you use the absolute values of the slopes when determining the steepness.

So here it would be: $\frac{3}{4},7,\frac{1}{4},2$
Now, arrange them from least to greatest: $\frac{1}{4},\frac{3}{4},2,7$

As you can see, $\frac{1}{4}$ is the smallest number/slope.

Hope this helps!

7 0

2 years ago

5x8(34-21+62)•56% 628^6 53%•927

sdas [7]

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3 years ago

Read 2 more answers

Lisa has a scholarship that pays 75% of her tuition for all four years she attends college. What is the total amount the scholar

12345 [234]

Since you're given the total cost per year (12,000) you multiply it by 4 so that you get the total amount for the four years. e.g. (4 x 12,000) = 480,000
Now you calculate the 75% from this amount because we want to obtain the amount of money the scholarship is worth. That is 480,000 x 75% = 360,000
or 480,000 x 0.75 = 360,000
So, the scholarship is of 360,000

3 0

2 years ago