The math club is selling raffle tickets to raise money for the Fall Ball. The raffle tickets cost them $0.08 each at the office supply store and they spent $55 making t-shirts for the club members to wear. They are selling the raffle tickets for $2 each. If

x
represents the number of raffle tickets they sell, the following functions can be used to represent this situation where
()
C
(
x
)
is the club's costs and
()
R
(
x
)
is the amount of revenue they make selling the tickets.

()=0.08+55
C
(
x
)
=
0.08
x
+
55

()=2
R
(
x
)
=
2
x

Which of the following functions represent the profit,
(),
P
(
x
)
,
made by the math club during their raffle ticket sale?

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

Classify the following soils according to the uscs classification system. provide appropriate uscs designations. a) this sample of well-graded gravel with sand was obtained from a large earthen dam in vancouver, canada. the sample has 73% fine to coarse sub-angular gravel, 25% fine to coarse sub-angular sand and 2% fines. the maximum size of the particles is 75 mm. the coefficient of curvature is 2.7, while the uniformity coefficient is 12.4. b) this dark brown and wet soil with a “strong organic odor” has 100% passing the no. 200 sieve. the liquid limit of the material is 32% when not dried and is 21% when oven-dried. the plastic index is 21% when not dried. c) this sand has 61% predominantly fine sand, 23% silty fines, and 16% fine sub-rounded gravel size. the maximum size is 20 mm. the liquid limit is 33% and the plastic limit is 27%. d) this soil has 74% fine to coarse sub-angular reddish sand and 26% organic and silty dark brown fines. the liquid limit is 37% when not dried and is 26% when oven dried. the plastic index is 6% when not dried.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference