A tri-axle truck typically holds 11 yards of concrete. A dry yard weighs 3,500 pounds A standard conrete mix uses 500 pounds of cement. 1,200 pounds of sand, and 1,800 pounds of gravel or crushed stone. 3,000 grade concrete for sidewalks is $82.00 per cubic yard. 3,500 grade conrete for driveways is $83.50 per cubic yard. Gravel is 1.4 tons per cubic yard. One gallon of water weighs 8.35 pounds, and there are 7.48 gallons in a cubic foot. #1 Calculate the amount of concrete and the number of truckloads needed for a sidewalk that is 70 ft x 3 ft x 4 inches.

#2. Calculate the cost for the sidewalk that is 70 ft x 3 ft x 4 inches as described in #1.

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step-by-step explanation:

answer: rolling a number cube and flipping a coin.

step-by-step explanation:

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages