Plz will give 40 points! astronomers observed a planet orbiting a distant star. they expected the planet to orbit the star approximately 1 7/8 times every 4 earth years. about how many earth years will it takr the planet to orbit the star once? a. 15/32 b. 7 1/2 c. 2 2/15 2/15

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18