$21.50 for 4 pounds of lunch meat or $15.10 for 3 pounds of lunch meat

Step-by-step explanation:

Two options are there for lunch meat.

$21.50 for 4 pounds and $15.10 for 3 pounds.

We will calculate the unit rate to find which one is better deal.

∵ price of 4 pounds of lunch meat = $21.50

∴ Price of 1 pound of lunch meat =

                                                       = $5.375 ≈ $5.38/pound

∵ cost of 4 pound of lunch meat = $15.10

∴ cost of 1 pound of lunch meat =

                                                     = $5.03/pound

Therefore, second option gives better deal, of $5.03 per pounds of lunch meat.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,