Abag contains both black and red marbles. the ratio of black to red marbles is 3: 4.

a: what is the ratio of black marbles to the total number of marbles in the bag?
b: what is the ratio of red marbles to the total number of marbles in the bag?

select two answer choices. select one answer choice for question a, and select one answer choice for question b.

b: 4: 1
b: 3: 1
b: 3: 7
a: 4: 7
a: 3: 7
a: 4: 1
b: 4: 7
a: 3: 1
a: 4: 3
b: 4: 3

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.