lizzlegnz999

02.08.2019 • 

Mathematics

Sam works two jobs, one at the zoo and the other at the library. he drives 24 miles round-trip to the zoo and 9 miles round-trip to the library. he never works two jobs in the same day. his car has a 15 gallon gas tank and gets 20 miles per gallon. if his tank is now empty and he has worked 12 days at the library since his last filling up, how many days did he work at the zoo?

Ответ:

sulemmaa

03.06.2020

Mathematics

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Full tank = 15 gallon
15 x 20  = 300 miles
A full tank can travel 300 miles

12 days at the library:
12 x 9 = 108 miles

The rest of the miles were for going to the zoo
300 - 108 = 192 miles

Number of round trips to the zoo:
192 ÷ 24 = 8

He worked 8 days at the zoo.

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Ответ:

corvettapj6583

11.10.2022

Mathematics

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Step-by-step explanation:

Given that two fair dice are rolled 3 times and the sum of the numbers that come up is recorded.

a) The sum is 4 on each of the three rolls.

(1,3) (2,2) (3,1) HEnce for one throw prob = 3/36 =1/12

Prob for getting same sum 4 in 3 rolls =

(since each trial is independent)

b) Prob sum =4 in exactly 2 rolls

= =

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