The correct answer is C) 71
The first one is the second one. t(n)=20n+480
Question 4: is the first one t(n)=8n+15
The answer to the third question is that the root of the chord is a Gb.
We round a number to three significant figures in the same way that we would round to three decimal places. We count from the first non-zero digit for three digits. We then round the last digit. We fill in any remaining places to the right of the decimal point with zeros.
