The lopez family had dinner at a restaurant. the bill for the meal was $68 and they gave the waiter a 20% tip. what was the total cost of the dinner? a. $68.20 b. $70.00 c. $81.60 d. $88.00

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Write the equations in logarithmic form 10^3=1,000