Part a: ms. donaldson earns $18.80 per hour for the first 40 hours she works in a week. she earns 1 1/2 times that amount per hour beyond 40 hours in a week. last week ms. donaldson worked 45.5 hours. how much money did she earn?
$907.10.
part b: a health insurance payment of $34.55 was deducted from ms. donaldson's earnings for the week. after the insurance deduction, payroll taxes equal to 28% of the balance were deducted. what was the amount that ms. donaldson received?
i need the answer for part b! , you! : )

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Me. i can't figure out this question. give an explanation too. .