a. Mirabai's income tax rate on additional income is 42%. She has just received a wage increase

Question:

a. Mirabai's income tax rate on additional income is 42%. She has just received a wage increase of $1.25 per hour. What is her after-tax increase in hourly pay?
b. Shiras tax rate on additional income is 47%. How much extra must he earn to keep an additional $1000 after tax?

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