Rachel is a stunt driver, and she's escaping from a building that is about to explode! ddd represents rachel's remaining distance (in meters) as a function of time ttt (in seconds). d=-38t+220d=−38t+220d, equals, minus, 38, t, plus, 220 what is rachel's speed?

38 m/s

Step-by-step explanation:

We are given that

D represent Rachel's remaining distance( in meters ) as  a function of time is given by

We have to find the Rachel's speed.

We know that

Substitute the values then we get

Hence, the Rachel's speed is given by =38 m/s

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

1gm = 1000mg so 0.1gm = 1000mg

first, convert the weight to kg

160lb * 1kg/2.2lb = 72.7kg

next, the dose

72.7kg * 100mg/kg = 7270mg