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03.12.2019 •
Mathematics
44. what percent of 75 is 30?
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Ответ:
40%
Step-by-step explanation:
30/75 = 0.4
Move decimal point back 2 places to convert to percent.
0.4 = 40%
Ответ:
a) Terrance's speed- 12![\frac {{textrm{ miles}}}{{textrm{ hours}}}](/tpl/images/0359/6257/ec325.png)
Jesse's speed -8![\frac{{textrm{ miles}}}{{textrm{ hour}}}](/tpl/images/0359/6257/8158f.png)
b) Teerance ;- 4 hr 10 min ; Jesse ;- 6 hr 15 min
c) Sandra's speed :-![10 \dfrac{2}{3} \frac{{textrm{ mile}}}{{textrm{ hour}}}](/tpl/images/0359/6257/2d2db.png)
Step-by-step explanation:
Terrance runs
in
an hour 6 miles
So in 1 hour he / she runs
miles
= 12 miles.
So Terrance's speed is 12
---(1)
Jesse's runs
In 15 minutes 2 miles
So, In 1 minute
miles
So, in 60 minutes
miles
= 8 miles
So, Jesse's speed is 8
----------(2)
Terrance runs,
12 miles in 1 hour
so, 1 mile in
hour
so, 50 miles in
hour
=
hour
=4 hour
minutes
= 4 hour 10 minutes.
Jesse runs,
8 miles in 1 hour
so, 50 miles in
hour
=
hour
= 6 hour
minutes
= 6 hour 15 minutes
Sandra runs,
in 45 minutes 8 miles
so, in 1 minute
mile
so, in 60 minutes
miles
=
miles
So Sandra's speed is ,
---------------- (3)