Which model shows all of these numbers correctly placed one the number line

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.