A piece of steel is 80cm long at 20 C. The coefficient of linear expansion for steel is 12 x 10^-6 (K)^-1. The increase in length and the final length 80.25 cm at what temperature this reading was?

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explanation:

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c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

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the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.