At 7 p. m. the temperature was 4C°. By 8 p. m.it had increased 20°, by 9p. m. It has decreased y
1 Cº, by 10pm it has decreased by 15 Cº. What
was the temperature at 10p. m.?

8 C°.

Step-by-step explanation:

7 p.m. was 4 C°. 1 hour later, it had increased 20 C°, so we take 4 added by 20. That gives us 24 C°. 1 hour later, it has decreased by 1 C°. So we take 24 minus 1. That gives us 23°C. And then by 1 hour later, it has decreased by 15°C. So we take 23 minus 15, equals to 8°C.

16.80 times .20= 3.36

step-by-step explanation:

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.