Elton is a candle maker. Each 15 cm15 \text{ cm} 15 cm 15, start text, space, c, m, end text long candle he makes burns evenly for 66 6 6 hours. If Elton makes a 45 cm45 \text{ cm} 45 cm 45, start text, space, c, m, end text long candle, how long would it burn?

45 cm long candle would take 18 hours to burn.

Step-by-step explanation:

Given:

Elton is a candle maker.

Each 15 cm long candle he makes burns evenly for 6 hours.

If Elton makes a 45 cm long candle.

Now, to find hours it would take to burn 45 cm long candle.

So, to solve by using unitary method:

Each 15cm candle take time to burn = 6 hours.

So, 1 cm candle take time to burn =

Thus, 45 cm candle take time to burn =

Therefore, 45 cm long candle would take 18 hours to burn.

the third picture

step-by-step explanation:

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is: