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8. Video games are on sale this week for 20% off. The video game originally costs $42.
a) What is the amount of the discount?
b) What is the sale price of the video game?
9. Find the simple interest earned on $3200 invested in a bank at 3% annual interest for 4 years. (I = prt)
Please help

Respuesta :

Answer:

  • $8.4
  • $33.6
  • I= $384

Step-by-step explanation

  • Amount of discount: 20%= 0.20; 0.20×42= $8.4
  • Sale price: $42-$8.4= $33.6

For interest question, plug in the values:

P= $3200

r= 3%÷100 = 0.03

t= 4 years

Calculate:

I=Prt

= 3200×0.03×4

=$384

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