If the lamp from problem 30 is left on for 12 hours, and electricity costs $0.05 per kilowatt∙hour, how much energy did the lamp use, AND how much did it cost?

Draw a tape diagram to represent each situation. for some of the situations, you need to decide what to represent with a variable andre bakes 9 pans of brownies. he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Will gve pints stars and brainliest

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c