Luisa hiked 7 miles of a 21 mile trail what percent of the trail did luisa hike?

In the surface area formula for cylinders which expressionrepresents the lateral area

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3