Michael purchased a prepaid phone card for $50.00. Calls cost 10 cents a minute using this card. The credit, C (in dollars), left on the card after it is used x minutes of calls is given by the following.
C = 50.00 -0.10.x
How much credit is left on the card after Michael uses it for 40 minutes of calls?

how many friends does he have? i think some of the information got cut off in the problem.

if the rectangular pool has a area of 192 square ft. and length of 15 ft. you must divide 15 into 192. 192 ÷ 15 = about 13 ft.

b) yes

step-by-step explanation:

let the statements be named as,

statement 1: if the power has been cut, then the refrigerator does not work.

statement 2: the refrigerator does not work.

conclusion: the power has been cut

now, 'law of detachment states that if we have the statements given as,

1. if p, then q.

2. p

then, we get the true statement or conclusion as q'.

thus, on comparing, we get that,

p: if the power has been cut.

q: the refrigerator does not work.

so, the argument is true by the law of detachment.

figure it out it is easy