3 years ago

Practice Problems

Mathematics

1 answer:

katen-ka-za [31]3 years ago

6 0

15 red marbles
12 green marbles
15+12 = 27 marbles in total

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An athlete ran a sprint of 100 ft in 3.1 s. At what speed was the athlete running in miles per hour? Round to the nearest mile p

nordsb [41]

Answer:

22 miles per hour

Step-by-step explanation:

we know that

The speed is the ratio of distance by the time

Let

d -----> distance in feet

t ----> time in seconds

s ----> the speed in ft/sec

$s=\frac{d}{t}$

we have

$d=100\ ft\\t=3.1\ sec$

substitute

$s=\frac{100}{3.1}$

$s=32.26\frac{ft}{sec}$

Remember that

$1\ mi=5,280\ ft$

$1\ h=3,600\ sec$

Convert ft/sec to mi/h

$s=32.26\frac{ft}{sec}=32.26\frac{(1/5,280)}{(1/3,600)}=32.26(\frac{3,600}{5,280})=22\ \frac{mi}{h}$

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2 years ago

Find sum 3.24 +.07 =

BartSMP [9]

Answer:

3.94

Step-by-step explanation:

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Is it impossible to raise the number to the power of to and get a number less than the original number

finlep [7]

No (unless you're talking about a whole number), for example...
0.2^2 = 0.04

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3 years ago

Divide € 165 into the ratio 1:2:12

fenix001 [56]

Answer:

11 : 22 : 132

Step-by-step explanation:

1 + 2 + 12 = 15

165 ÷ 15 = 11

1 × 11 = 11

2 × 11 = 22

12 × 11 = 132

11 : 22 : 132

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Answer:

Step-by-step explanation:

Cause

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