speed of the boat in still water is 15km/h. it goes 30km upstream and returns back at the same point in 4hr 30 min. find the speed of the stream

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!