Olly drove 56 km from Liverpool to Manchester. He then drove 61 km from Manchester to Sheffield.

Olly’s average speed from Liverpool to Manchester was 70 km/h.
Olly took 75 minutes to drive from Manchester to Sheffield.

Work out Olly’s average speed for his total drive from Liverpool to Sheffield.

Input note: give your answer correct to 1 decimal place.

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

What is the value of r of the geometric series?

Atemperature of 1.64◦f corresponds to answer in units of ◦c.