Which equations illustrate the commutative property of multiplication?

choose exactly two answers that are correct.

a.
• 3.4 = 3.4 •

b.
–8 • (5 + 3.1) = (5 + 3.1) • (–8)

c.
–4 • (5 + 7.1) = –4 • 5 + (–4) • 7.1

d.
–8 • (4 • 1) = (–8 • 4) • 1

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

Astudent has created the give circuit diagram. it consists of a battery, a resistor, and a light bulb. in one minute, 1.2c of charge flows through the resistor. how much charge flows through the light bulb in one minute?