Algebra1
posted by y912f .
45. Find your percent correct on a test if you received 61 points out of 69 possible.
88.4%
49. Find your percent on a test if you received 42 points out of 80 possible.
52.5%
50. Scientific notation is most effective when used with _____
a. very small numbers
b. very large numbers
c. imaginary numbers
d. very large and very small numbers
D

45 and 49 are correct.
No idea about the last one. 
The last one is correct, as well.