Do the functions have the same concavity?
f(x)=-x^2-15x

A. Yes f and g both concave down

B. Yes, f and g both concave up

C. No, f is concave up and g is concave down

D. No, f is concave down and g is concave up

kk.bj.

step-by-step explanation:

.mnm.kn.kj

depends on how many days you are talking about

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

answer: an 8-foot rope is tied from the top of a pole to a

stake in the ground, as shown in the diagram

below

step-by-step explanation: