Mr. luca would like to purchase a digital
keyboard for each of his 3 nieces and
1 nephew. the keyboard costs $105.
a. mr. luca thinks the total cost should
be about $200. is this amount
reasonable? explain.
b. write and solve an equation to find the total cost of the keyboards. explain why your answer is reasonable.

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

The label on the car's antifreeze container claims to protect the car between ? 40°c and 125°c. to convert celsius temperature to fahrenheit temperature, the formula is c = 5 over 9 (f ? 32). write and solve the inequality to determine the fahrenheit temperature range at which this antifreeze protects the car. ? 40 > 5 over 9 (f ? 32) > 125; ? 40 > f > 257 ? 40 < 5 over 9 (f ? 32) < 125; ? 40 < f < 257 ? 40 < 5 over 9 (f ? 32); ? 40 < f 5 over 9 (f ? 32) < 125; f < 257

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?