# Posts by dona

Total # Posts: 19

math
a mobile phone company charge for a local call such that \$0.5 in the first minute and \$0.3 every minute there after. Find a formula for the total amount charged for call lasting in x minutes

math
if x is an even number. find the next two consecutive even numbers in term of x

Math
(x-1)/2+(x-2)/2+(x-3)/2+...(x-100)/2=...

probability
a teacher holds 40 class cards of 14 girls and 26 boys. shes huffles the cards and drawn one. a. what is the probability that the card drawn is a girl's card? b. what is the probability that the card belongs to a boy? c. what is the probability that the cards belongs to ...

Math
1-(-2)^2*(-1)^3=

math
(x-1)+(x+2)+(x-3)+(x+4)...+(x+100)=0

physics
A stone is dropped from a height of 4.5m.What will be the distance travelled by it during the last second of its fall?

Math
I need help to set the equation up to solve a system to ensure that I get the answer of (-2, 4)? I also need tosolve two problems in the quadratic equation method, the two problems are x to the second power - 2x - 13 = 0 then the other is x to the second power + 12x - 64 = 0 I...

arithmetic
lim_(x->0) (1/x^2-1/(sin^2(x)))

college algerbra
2bx3 + 3bx2 − 18bx −27b

mes
a solution of sugar in water is 5% by mass. how much sugar is present in 250 gm. of solution?

algebra
at 5 p.m., a person 5 feet tall casts a 10-foot shadow. at the same time, a flagpole casts a 40-foot shadow?

MATH
Find the product 3[x-(- 1/3+2iã14/3)][x-(-1/3-2iã14/3)]

math
how to solve 3[x-(- 1/3+2iã14/3)][x-(-1/3-2iã14/3)]

Physics
twenty....2m/s(2.4)(5.40)....

chemistry
How many mililmeters(mL) are in a sample with 2.0L?

history
which group did the virginia plan favor ?

math check please
the answer for #2 is 15.235

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