Exercise A: Patterns - Finding Formulas and Missing Values 1. Andre sells silicon cell phone covers at his stall. His fixed cost is R500 per month and he
pays R25 per cell phone cover. His costs are shown in the table below:
Number of items (n)
0 1
3
10
Total cost in Rand (C) 500 525 550 575
875
(a) Find the formula for calculating his total cost. Use C for total cost and n for the
number of cell phone covers.
(b) Hence, calculate the values of the unknown letters. Show all your steps.
2.
A​

Which of the following parabolas opens up?

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

What is the true solution to the logarithmic equation below?