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4 years ago

Donya ran a 3k race at a constant speed in 21 minutes 30 seconds. At this speed, how long does it take her to run 1k?

Mathematics

2 answers:

Illusion [34]4 years ago

7 0

Answer:

7 minutes 10 seconds.

Step-by-step explanation:

Donya ran a 3 k race at a constant speed = 21 minutes 30 seconds

1 minutes = 60 seconds

21 minutes 30 seconds = 21 + (30/60) = 21.5 minutes

At this speed it would take her to run 1 k race $=\frac{21.5}{3}$

= 7.17 minutes

7.17 minutes = 7 + (0.17 × 60) = 7 minutes 10 seconds

At this speed it takes her 7 minutes 10 seconds to run 1 k race.

Zigmanuir [339]4 years ago

4 0

Answer:

7 minutes and 10 secs

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

The table shows the values of a function f(x).

QveST [7]

Answer:

The average rate of change is $=-4$

Step-by-step explanation:

The average rate of change from x=a to x=b of f(x) is given by;

$=\frac{f(b)-f(a)}{b-a}$

We want to find the average rate of change of the function represented in the table from x=-2 to x=2.

$=\frac{f(2)-f(-2)}{2--2}$

From the table f(-2)=25 and f(2)=9

The average rate of change from x=-2 to x=2 is

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3 0

3 years ago

How do I round 47,283 to the nearest 100,000

rosijanka [135]

The answer is zero.

Explanation:

The 4 is in the ten-thousands place.

Write the number 47,283 with an additional zero in the 100,000 place.

047,283

To round to the nearest 100,000, all digits to the right of the 100,000 place become zero. That means that the digits 47283 all become zero. Since 4 is less than 5, the digit to its left is not raised by 1, so the 100,000 place digit remains zero, and you end up with 000,000, which is simply 0.

Answer: 0

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3 years ago

Exam question: You can buy a 57-pound bag of flour for $ 11 or you can buy a 1-pound bag for $ 0.41 Compare the per pound co

egoroff_w [7]

Answer:

Step-by-step explanation:

57 lb bag for $ 11 or 1 lb bag for $ 0.41

11/51 = 0.215 .....rounds to 0.22 ......this is the correct way...... the student messed up and divided wrong.

the large bag only charges $ 0.22 per lb, whereas, the small bag charges $ 0.41 per lb.

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4 years ago

Cora’s kitten weighs 1,200 grams. If he weighed 550 grams at the last visit to the veterinarian’s office, what is the percent in

Neporo4naja [7]

percent increase = (new -original)/original

= (1200-550)/550

650/550

=1 100/550

1 2/11

1.181818

118.18 percent

to the nearest whole number

118 %

8 0

3 years ago