Help please help please

Acamper leaves camp on a kayak and travels 50 miles east on a river, then he ties his kayak to the bank and travels 20 miles north on a bicycle. this trip can be plotted on the coordinate plane, where the camp is the point (0, 0). the distant of the camper to the camp can be found using the distance formula. which other formula can he use? a) 502 - 202 b) 502 + 202 c) 502 - 202 d) 502 + 202

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle