Abag holds 28 blue marbles and 49 red marbles. what is the ratio of red marbles to the total number of marbles in the bag?

a) 7 to 11
b) 7 to 4
c) 4 to 7
d) 4 to 11

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Simplify the expression 10/11(22z) + (a+5) -1

What is the volume of a cone with a height of 6 cm in the radius of 2 cm