# Recent posts

Title Last Post Calculation of true distance of a line measuring 160.42 m using a tape that is 0.02m too long January 22, 2021 - 11:34am
A circle has an equation of x^2 + y^2 + 2cy = 0. Find the value of c when the length of the tangent from (5, 4) to the circle is equal to one. January 18, 2021 - 11:45pm
Calculate the acute angle between 2x - 4y - z = -5 and 3x + 4y + 5z = -6 January 17, 2021 - 2:05pm
If arcsin (3x - 4y) = 1.571 and arccos (x - y) = 1.047, what is the value of x? January 17, 2021 - 12:48pm
The digits of a three-digit number are in arithmetic progression, find the sum of all the digits January 13, 2021 - 12:12am
There are 7 arithmetic means between 3 and 35. What is the sum of all the terms? January 12, 2021 - 11:09pm
A boat going upstream takes 1.5 times longer than going the same distance downstream. If the water current in the river is 8 kph, calculate the speed of the boat in still water. January 12, 2021 - 9:22pm
What is the equation of the normal to the curve x^2 + y^2 = 25 at (4, 3)? January 12, 2021 - 10:40am
What is the radius of the circle x^2 + y^2 - 6x = 0? January 11, 2021 - 10:39pm
When the polynomial x^4 + bx^3 + 5x^2 + dx + 6 is divided by x - 2 the remainder is 16. When it is divided by x + 1 the remainder is 10. Find the value of constant d. January 10, 2021 - 4:51pm
Gas is escaping from a spherical balloon at a constant rate of 2 fˆ3/min. How fast is the outer surface area shrinking? January 10, 2021 - 12:50pm
Determine the percentage uncertainty in the area of a square that is 6.08 (+/-) 0.01 m on a side. January 3, 2021 - 7:41pm
In still water, your small boat average 8 miles per hour. It takes you the same amount of time to travel 15 miles downstream, with the current, as 9 miles upstream, against the current. What is the rate of water's current? January 3, 2021 - 6:13pm
BCR of $180,000 investment yielding$60,000 annual benefits at 7% annually January 3, 2021 - 12:53pm
Which pizza is a better buy: large with 16-inch-diameter for $15 or medium with 8-inch-diameter for$7.50? January 3, 2021 - 11:39am
Given the following equations: ab = 1/8, ac = 3, bc = 6. Find the value of a + b + c. January 2, 2021 - 11:27pm
Please help me solve this problem: Moment capacity of a rectangular timber beam January 2, 2021 - 4:43pm
Which of the following is the derivative with respect to x of (x + 1)^3 - x^3? January 1, 2021 - 1:09pm
How many men paid for a total amount of \$262,143.75 if the first person to arrive only paid 25 cents? December 31, 2020 - 1:19am
How many terms from the progression 3, 5, 7, 9, ... must be taken in order that their sum will be 2600? December 31, 2020 - 1:19am
Find the probability that somebody is healthy given that they have positive test result? December 29, 2020 - 8:20pm
What is the probability that 4 depth charges will sink the submarine? December 29, 2020 - 3:30pm
Find the equation of the curve passing through the point (3, 2) and having s slope 5x^2 - x + 1 at every point (x, y) December 29, 2020 - 12:58am
A coin is so unbalanced that you are likely to get two heads in two successive throws as you are to get tails in one December 28, 2020 - 11:27pm
Probability Problems Involving Coins December 28, 2020 - 9:37pm