Answer:
15
Explanation:
15 times 10 is 150, therefore there is 15 tens inside 156.
Answer: provide climate data representing times when instruments were not available to measure them.
Explanation:
Proxy data provides climate data representing times when instruments were not available to measure them.
Answer: the answer is A.
Explanation: hope this helps!
The answer is B. A only. The optimum valve timing is found through experimentation using an engine dynamometer. The timing of the opening and closing of the valves is called valve timing. So the use of dynamometer measures the power output of a machine that is why it can measure the optimum valve timing.
