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3 years ago

Sally drove 150 miles in 2 1/2 hours. What is her average speed in miles per hour.

Mathematics

2 answers:

Radda [10]3 years ago

8 0

Answer: 150 divided by 2 1/2 is 60

Step-by-step explanation:

nadezda [96]3 years ago

8 0

Answer:

Her average speed was 60 miles per hour.

Step-by-step explanation:

150 divided by 5 is 30.

30 x 2 = 60

Because 2 1/2 contains 5 half hour.

When you get that single half hour you times it by 2 since 1 hour is made up of 2 half hour. Which makes 60 miles per hour.

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Lana71 [14]

Since roots go down into the ground, the answers must be negative. That eliminates both 2 4/5 deep and 3.86. You could look at a number line if your unsure, but -3.54 is between 3 and 4, as is -3 2/5.

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3 years ago

Ms. Carey grades 4 tests during her lunch. She grades 1/3 of the remainder after school. If she syill5has 16 test to grade after

enot [183]

Answer: 24 tests

Step-by-step explanation:

Ms. Carey graded 1/3 of the tests and still had 16 tests to go.

This means that the 16 tests represent the remaining proportion of the total number of tests:

= 1 - 1/3

= 2/3

2/3 of the total is equal to 16 tests. Assuming the total is x, the expression would be:

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3 years ago

The half-life of the radioactive element unobtanium-43 is 10 seconds. If 48 grams of unobtanium-43 are initially present, how ma

natka813 [3]

Answer:

At time, 10 seconds, the mass remaining is 24 grams

At time, 20 seconds, the mass remaining is 12 grams

At time, 30 seconds, the mass remaining is 6 grams

At time, 40 seconds, the mass remaining is 3 grams

At time, 50 seconds, the mass remaining is 1.5 grams

Step-by-step explanation:

Given;

initial mass of the radioactive element = 48 grams

half life, t = 10 seconds

time of decay (s) remaining mass of the radioactive element

0 ------------------------------------------------- 48 grams

10------------------------------------------------- 24 grams

20 ------------------------------------------------- 12 grams

30 -------------------------------------------------- 6 grams

40 --------------------------------------------------- 3 grams

50 ----------------------------------------------------- 1.5 grams

60------------------------------------------------------0.75 grams

Thus;

At time, 10 seconds, the mass remaining is 24 grams

At time, 20 seconds, the mass remaining is 12 grams

At time, 30 seconds, the mass remaining is 6 grams

At time, 40 seconds, the mass remaining is 3 grams

At time, 50 seconds, the mass remaining is 1.5 grams

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3 years ago

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ludmilkaskok [199]

Answer:

im here for the a

Step-by-step explanation:

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3 years ago

The Council of American Beet Farmers estimate that 60% of Americans love beets.

harkovskaia [24]

Answer: 13% or 0.1314

Step-by-step explanation: Binomial PDF on the calculator or by hand its

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3 years ago