Top answers

The mass of a substance is increasing exponentially. Initially its mass is 37.5g, 5 months later its mass is 52g. What is its mass 9 months after the initial value to 2 d.p?

M=37.5e kt 52=37.5e k 5 52/37.5=e 5k ln(52/37.5)=5k (1/5) (ln(52/37.5))=k k≈0.06538 when t=9, M=37.5e 9*0.06538 M=67.54
RR
Answered by Riccardo R. • Maths tutor
4699 Views

At a school number of boys : number of girls = 9 : 7 There are 116 more boys than girls. Work out the total number of students at the school.

B:G --> 9:7 Expressed as fractions of the whole group, boys are 9/16 of the group and girls are 7/16 of the group. We can use algebra to work out the total group number. For our working, I will use x to r...
DM
Answered by Dionne M. • Maths tutor
16573 Views

What is the integral of x^(3)e^(x) with respect to x?

This question is looking at integration by parts. Therefore, we need to split the integral into two parts. Part A will be x 3 and Part B will be e x . Draw 2 columns putting Part A in the RIGHT and B in the ...
JB
Answered by James B. • Maths tutor
5474 Views

How should I approach an essay question in the exam?

Essay questions can seem overwhelming at first glance, but there is a tried and tested approach that can really help you get a great mark. Firstly, it will help to prepare beforehand. Gather together all the...
OM
Answered by Oran M. • Spanish tutor
2728 Views

Opposition to anything that oppresses the human spirit is the element that dominates Blake's Innocence vs. Experience. How far do you agree with this statement?

It is important to have a clear structure in English essays. Blake's book of poems is divided into two parts; Innocence and Experience. This divide can be used as the structure for this essay (there are of c...
FR
8388 Views