Mathematics

The heigh of a cylinder is equal to its diameter, and the volume is 99. Find surface area

volume of cylinder = PI*R^2*H 99 = 2PI*R^3 R = 2.507 H = 5.014 Area (if closed) = 2*PI*2.507*7.521 = 118.47-99 = pir^2 *2r = 2pir^3 r = [99/(2pi)]^1/3 = approx 2.5 Surface area = 2pir^2+ 2pir^3 = 2pir

Help with this algebra question? Can you please answer

Find the third, seventh, and tenth terms of each sequence: 1. A(n) = -5 + (n - 1)(2) 2. A(n) = 1.2 + (n - 1)(-4) 3. A(n) = 8 + (n - 1)(-3)-1). A(n) = -5 + (n - 1)(2) A(3) = -1 A(7) = 7 A(10) =

Population standard deviation

The following are all6 quiz scores of a student in a statistics course. Each quiz was graded on a 10-point scale 10, 10, 8, 8, 8, 10 Assuming that these scores constitute an entire population, find th

Solve the system of equations by graphing.

x – 3y = -3x + 3y = 9-x – 3y = -3 -3y = -x -3 y = 1/3x + 1 Y intercept = 1 So when graphing start at (0, 1) Slope = 1/3 Rise over run so go up one unit, three units to the right. Repeat to graph.

Probability Question: A Question is tossed 4times..

a) Whats is the probability of tossing atleast three heads if a fair coin is tossed four times: My attempt: atleast 3heads = heads 3times or heads four times so: 4!/3!=44 x (1/16)= 1/4 probability f

Use the substitution method to solve the system of equation 4x-8y=0..x^2+y^2=25..........5 stars best answer

STEP I: solve the equation 4x-8y=0 for x. show your work. x=_______________________ STEP II: substitute the expression you foundfor x in step 1 into the equation x^2+y^2=25. then solve for y . show y

Solve the system of equations by the substitution method.

0.07x – 0.01y = 2.3 0.28x + 0.13y = 17.7-the substitution method says: 1. take one of the 2 equations and solve for x in terms of y or y in terms of x. 2. plug this value into the other equation. 3.

Probability question i need help with

Mr. Doodle’s grade distribution over the past 3 years for a course in college algebra is shown in the chart below. Grade Number A 45 B 180 C 110 D 95 F 65 I 5 If Jane plans to take a college algebra

Solve this equation modulo 16 : x^8 - x^4 = 0 mod 16

0 obviously works: 0^8 = 0 and 0^4 = 0. Since 2^4 = 16, every even number raised to either the 4th or 8th power = 0 (mod 16), since it will have 4 factors of 2. So for starters, all the even numbers

Differential Equations Newton's law of Cooling (Heating)

A cold beer initially at 35*F warms up to 40*F in 3 minutes while sitting in a room of temperature 70*F. How warm will the beer be if left out for 20 min? Im completely lost.I think it turns in to th

Four feet of wire is to be used to form a square and a circle

How much wire should be used for the square and how much for the circle in order to enclose the least, respectively the greatest, total area?-Your statement of the problem seems somewhat vague or uncl

A ring has a hole of diameter 1" and its area is 1sq inch. Find outer diameter of the ring

1.5077 inch-ring having hole of dia 1.and its area shud b0.785 sq inch.so qstn is not valid.

How can you prove the identity of tan(x+pi) - tan(pi-x) = 2tanx

tan(x + pi) = tan(x) tan(pi - x) = - tan(x) tan(pi+x) - tan(pi-x) = tan(x) + tan(x) = 2tan(x)-tan (x + pi) = tan x tan (pi - x) = - tan x tan x - (- tan x) = 2 tan x

Someone please tell me how to solve this problem or where i can find out how.

If |2x + 9|= 33, x =-two cases to consider 2x + 9 = 33 2x = 24 x = 12 -(2x+9)= 33 which is the same as 2x+9 = -33 2x = -42 x = -21-With an absolute value problem, you really have two equations.One e

Complex logarithm question

Express y in terms of x if, (a) log4 y = log2 x + log2 9 - log2 3 (b) log9 y + log3 y = 2 log3 x + 3 log3 2 i need the workings please, will choose as best answer within 10 minutes-log₄(y) = log₂(x)