Sarah is stringing insect beads to make a bracelet. The butterfly bead is 0.45 inch long and
the ladybug bead has a length of 0.27 inch. She uses each
type of insect bead and places them end to end. How many
of each type of bead does she use to make a line of insect
beads measuring 1.71 inches?

You need two butterfly and three ladybug.

Step-by-step explanation: (0.45x2) + (0.27x3) = 1.71

7

step-by-step explanation:

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%