raj is twice as old as shyam.4 years ago his age was 4 times shyam's age. find raj and shyam present age

Asking questions when something is unclear is part of?

Need will give 100 ! in no less than one hundred fifty words, explain why it is important for engineers to sketch designs and use them to clarify their designs to other people, giving at least three reasons.

Marijuana is likely to make a driver? a. become enraged at others' mistakes b. drive faster than is safe c. overreact to sounds on the road d. respond passively to a hazard