Jamie is hiking up a small mountain. He climbs up at a constant rate of 300 feet/hour until he reaches the peak at 1,500 feet. After that, he hikes down at the same rate to the base of the mountain. The equation that models Jamie’s elevation, e, after t hours is e =
a. - | t-300 | + 1500
b. -1500 | t - 5 | + 300
c. - | t - 1500 | + 300
d. - 300 | t - 5 | + 1500
. Jamie’s elevation will be 600 feet after
a. 2 b. 3 c. 4 d. 5
hours and after
a. 6 b. 7 c. 8 d. 9 hours.

3. dark matter

empty space could also be a simple vacuum

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.

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.