Answer:
49
Step-by-step explanation:
-3√(t) = -21
√(t) = 7
t = 49
3 Your teacher has disabled instant marking. Your
marks will appear after the due date.
To the nearest pound, Tim has £8
To the nearest 50p, Sue has £4.50
Work out the maximum possible total amount of money.
Give your answer in pounds (£) that is tha answer
Answer:
p < 319
Step-by-step explanation:
This question is best answered by finding the least common multiple of both 45 and 20. If a scenario indicates every so many, it would be like listing the multiples. It can be harder to list the multiples of bigger numbers (45, 90, 135, 180 and 20, 40, 60, 80, 100, 120, 140, 160, 180), so another strategy is to use prime factorizations. The prime factorization of 45 is <em>3</em> x <em>3</em> x 5 and the prime factorization of 20 is <em>2</em> x <em>2</em> x 5. The numbers that are the same in both prime factorizations are part of your answer. All other numbers (the italicized ones) also become a factor in your final answer, so 5 x 3 x 3 x 2 x 2 = 180. This means 180 minutes later they both start again at the same time. So 3 hours from 9 am is 12 noon.
