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Explain the meaning of reciprocity in regards to caregiver-infant interactions. (2 marks)

Reciprocity refers to a two-way interction between the caregiver and baby, where they take turns in responding to each other. The interaction is sustained as they continuously elicit responses from each o...

Answered by Yinka B. • Psychology tutor

7548 Views

Show that if a^n - 1 is prime then a = 2. If n is not prime, can 2^n-1 be prime?

This question is based on MAT 2015 question 2. This question has already built up the generalized difference of two powers in the buildup. We can apply this to aⁿ - 1 to give: aⁿ- 1...

Answered by Mark W. • MAT tutor

1538 Views

The actual size of a microrganism is 3.6 micrometres and the image size is 9 cm, what is the magnification of the diagram?

I = A X M M = I / A mm -> μm (x10000) 9 cm = 90000 μm90000 / 3.6 = x 25000 magnification

Answered by Sharon L. • Biology tutor

2221 Views

How would you go about calculating inflation using CPI (consumer price index)

- The consumer price index is the official measure of inflation in the UK - 2 surveys are conducted. The first survey is the Living Costs and Food surveys which involves approx. 7000 household...

Answered by • Economics tutor

1823 Views

b is two thirds of c. 5a = 4c Work out the ratio a : b : c Give your answer in its simplest form where a, b and c are integers

a : c = 4 : 5 and b : c = 2 : 3 so getting a common value of 15 for B gives a : c = 12 : 15 and b : c = 10 : 15 we can now compare these ratios and get 12 : 10 : 15 this is not divisible by any common f...

Answered by jamie c. • Maths tutor

8202 Views