If one store sells 12 pens for $9.00 and another sells 10 pens for $7.80, which is the better deal? if you have to buy 120 pens, how much will you save by using the less expensive supplier? compare prices per pen

Hi there!

Shop 1.
12 pens equals $9.00
1 pen equals $9.00 / 12 = $0.75
120 pens equals $0.75 × 120 = $90.00

Shop 2.
10 pens equals $7.80
1 pen equals $7.80 / 10 = $0.78
120 pens equals $0.78 × 120 = $93.60

Therefore shop 1 is the cheapest shop and offers the best deal. When buying 120 pens the second shop is $3.60 more expensive.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )