You want to buy 80 ounces of juice.
1- If you decide to buy the 10-ounce bottles:
Number of bottles needed = 80/10 = 8 bottles
each bottle costs $0.4
total cost = 0.4*8 = $3.2
2- If you decide to buy the 16-ounce bottles:
Number of bottles needed = 80/16 = 5 bottles
each bottle costs $0.56
total cost = 0.56*5 =$2.8
Therefore, if you go for the 16-ounce bottles instead of the 10-ounce bottles, you will save:
3.2-2.8 = $0.4
(1 + cscx)/cosx+cotx = (1+cscx)/(cosx+cosx/sinx)
= (1+cscx)/cosx(1+1/sinx)
= (1+cscx)/cosx(1+cscx)
= 1/cosx
= secx
The total square footage is 18*12+24*16=600. Buying four tiles at $17 for 4 square feet is the cheapest. The minimum cost is therefore 600/4*$17=$2550.
4/5. 16/20.
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The angle between the two tangents drawn from an external point to a circle and the angle subtended by the line segment joining the points of the contact at the Centre are supplymentary,
So,
15.) let the unknown angle be x
=》x + 55° = 180°
=》x = 180° - 55°
=》
16. let the unknown angle be n
=》n + 80° = 180°
=》n = 180° - 80°
=》