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Complete the following sentence using the correct form of the verb ‘aprender’: "Es imprescindible que los niños ________ sobre los peligros de internet de una manera segura."

When completed, this sentence translates to: "It is essential that children learn about the dangers of the internet in a safe way." The beginning of this sentence ("Es imprescindible que"...
ZM
Answered by Zoe M. • Spanish tutor
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How should I develop a point/paragraph in a source essay?

You can remember how to do this with the acronym TCP OK; T is for tone, where you discuss the expression in the source- is it biased towards a certain side, or trying to persuade? C stands for content, where...
ER
Answered by Ellie R. • History tutor
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A spherical balloon of radius r cm has volume Vcm^3 , where V =4/3 * pi * r^3. The balloon is inflated at a constant rate of 10 cm^3 s^-1 . Find the rate of increase of r when r = 8.

We are being asked to find the rate of change of radius, dr/dt. We will need to use the chain rule to do this: dV/dt = dV/dr * dr/dt. We are given that dV/dt is 10cm^3 per second, and differentiating V = 4/3...
MA
Answered by Max A. • Maths tutor
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Find the roots of y=x^{2}+2x+2

y=x 2 +2x-3 Can solve using quadratic equation. Using the square method to obtain for the square term and x term (x+1)(x+1) = x 2 +2x+1 Therefore (x+1)(x+1)-4=y To find roots equate to zero: (x+1)(x+1)-4=0 T...
HS
Answered by Harry S. • Maths tutor
6865 Views

Simplify i^{4}?

Simplify i 4 ? We know that i = -1 1/2 Therefore i 2 =-1 As i 4 =i 2 xi 2 Then i 4 =-1x-1=1
HS
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