The nth term of a sequence is n squared +20
work out the first three terms of the sequence
how many terms in the sequence are less than 50

Step-by-step explanation:

1 x 1 + 20 =21

2×2+20=24

3×3+20=29

only 5 terms less than 50

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%