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When to use “depuis” and when to use “il y a” with time expressions

1. Depuis I. If you want to say you have done something since a certain point in time, you use depuis with the present tense. o Je travaille comme professeur depuis 2017 >> I’ve worked as a teacher sin...
FH
Answered by Faye H. • French tutor
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Find the gradient at the point (0, ln 2) on the curve with equation e^2y = 5 − e^−x . [4]

Figure out what skills are being tested: implicit differentiation and exponentials and logarithms.e 2y = 5 - e -x 2e 2y (dy/dx) = e -x (dy/dx) = e -x / 2e 2y At (0, ln2) (dy/dx) = e 0 / 2e 2ln2 e 2ln2 = 4 as...
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Answered by Theodore C. • Maths tutor
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Calculate the resistance of a uniform wire of diameter 0.5mm, length 2m and resistivity 1.7x10^-8Ωm.

R=ρ L/AR= (1.7*10^-8 2)/(0.0005^2 π/4)R=0.173Ω
HW
Answered by Heather W. • Physics tutor
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Explain what is meant when it is said that there are inefficiencies in the production of goods and the allocation of resources.

The economy achieves optimal allocation of resources when productive and allocative efficiency are attained: · Productive efficiency occurs when products are made using the least possible amount of scarce re...
BS
Answered by Blanca S. • Economics tutor
6970 Views

Why is the demand curve downwards sloping?

The demand curve slopes downwards due to the idea of diminishing marginal utility. This is the idea that the consumer receives less additional utility for each extra unit of the good consumed.The substitutio...
JB
Answered by Joanna B. • Economics tutor
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