Question

1) Find the product using distributive law 142 X 97.

2) Simplify: 724.6 - 215.42 + 12.17

3)Find the number of right angles turn through by the hour hand of the clock when it goes from: 9 to 6.​

Answer 1

Step-by-step explanation:

1)

$142 \times 97 = (140 + 2) \times (100 - 3) = 140(100 - 3) + 2(100 - 3) = 14000 - 42 + 200 - 6 = 14152$

2) 521.35

3) 1

as hour hand covers 1 forth rotation of clock during 6 to 9, and total rotation is of 360 degree

therefore

$\frac{360}{4} dgree$

$= 90dgree$