In a sample of 10 cards, 4 are red and 6 are blue. if 2 cards are selected at random from the sample, one at a time without replacement, what is the probability that both of the cards will not be blue

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)

Jessa bought a yoyo from a company that claims that, with each retraction, the string rolls up by 60% of the original length. she sets up a tape measure and throws the yoyo 3 times. her data are charted below. throw length of string (feet) 1 3 2 1.8 3 1.08 jessa wants to find the sum of the length of string after 10 throws. what is the sum of the lengths, rounded to the nearest hundredth?