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A t-shirt is in the sale section of a store. It has 20% off and the new sale price is £12. What was the original price of the t-shirt?

Original Price x Percentage Multiplier = New Price Percentage Multiplier = (100-20)/100 = 0.8 OP x 0.8 = £12 OP = £12/0.8 = £15
KB
Answered by Katy B. • Maths tutor
4525 Views

A ball is projected at an angle b from the horizontal. With initial velocity V the ball leaves the ground at point O and hits the ground at point A. If Vcos(b) = 6u and Vsin(b) = 2.5u, how long does the ball take to travel between O and A.

This is a classic 2-D projectile question. The best way to solve this problem is to split the velocity into its x and y components. In the x-direction a projectile has no forces acting on it (as we neglect a...
TC
Answered by Tristan C. • Maths tutor
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Find the volume of revolution when the area B is rotated 2 pi radians about the x axis

First must recall the formula, of pi multiplied by the integral of y 2 After this, the correct integration should be applied, using an appropriate method that the student has learnt The correct limits used i...
LS
Answered by Louis S. • Maths tutor
10021 Views

Differentiate the following: 3/2 x^(3/4) + 1/3 x^(-1/4)

In simple differentiation, we can use the fact that if y= x^n, dy/dx is equal to nx^(n-1). In other words, multiply the x term by the power, then decrease the power by 1. Here we have 2 terms so approach the...
AW
Answered by Alex W. • Maths tutor
3945 Views

Find the Lowest common multiple of 96 and 132

First, split into prime factors- 96= 2^5 * 3 and 132= 2^2 * 3 * 11 Whilst very similar to highest common factor, lowest common multiple is found by comparing the two sets of prime factors, and for each prime...
AW
Answered by Alex W. • Maths tutor
4179 Views