Electric switches that regularly sell for $0.69 each are advertised this week at 5 for $2.75 . how much is saved by purchasing 5 switches at the sale price rather than at the regular price?

So we will be saving a total of $0.7 at new rate

Step-by-step explanation:

Given:

Original price =$ 0.69

New price = $ 2.75 per 5 switches

To find:

Saving = ?

Solution:

The original per price of the switch is given as = $ 0.69

Discounted price of 5 switches at $2.75

5 Switch price at original price = Original price * No of switches

                                                       = 0.69 * 5

                                                       = $ 3.45

Total saving at buying 5 switches = 3.45 - 2.75

                                                           =$0.7

So we will be saving a total of $0.7 at new rate

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: