Prove the following statements Hint: Use Contrapositive and DeMorgan's laws to reduce each line to the statements in problem II. Use A for ∀,"For all" and E for ∃,"There exists" a.) ∃xC(x) + ∃xB(x) <=> ∃x[C(x) + B(x)] show <=> to ∀xP(x)* ∀xQ(x)<=> ∀x [P(x) * Q(x)]

answer: 193

explanation:

200-7 = 193

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

the answer to question 1 is -8, 28.

step-by-step explanation: