an unfair coin has probability 0.3 of landing heads. the coin is tossed four times. what is the probability that it lands heads at least once

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

he has 140 chickens because he has 10 times more chickens than ducks and he has 14 ducks so 14*10=140