SchoolEqualsSadLife SchoolEqualsSadLife

02-02-2017
Mathematics

contestada

To get to work, you drive for 20 minutes at 30 mph, and walk 10 more minutes at 3 mph. What was your average speed?

a) 16.5 mph
b) 20 mph
c) 21 mph
d) 23 mph

Respuesta :

mdarrow01 mdarrow01

15-02-2017

Note D = r(t)
20min = 1/3 hr and 10min = 1/6 hr

(1/3hr)30mph + (1/6hr)3mph = 10.5 mi, the total distance traveled.

total distance / total time = average speed = 10.5/(1/3 + 1/6) = 10.5/(2/6 + 1/6)
10.5mi/.5hr = 21mph

Hope This Helps

Answer Link

Otras preguntas

A car is traveling at vx = 36 m/s. the driver applies the brakes and the car decelerates at ax = -6. 0 m/s2. what is the stopping distance?

What document explains your rights and responsibilities as a federal student loan.

Liquids are used in thermometer but not the solid.

In a similar rolling race (no slipping), the two objects are 2 solid cylinders of the same mass but different radii. which reaches the bottom first?

Tere has to take care of her cousin, who is a little rascal. She decides to send his mom an email to tell her about what her son is doing. Complete her email by

Calculate δs∘rxn for the reaction2no(g) o2(g)→2no2(g)express your answer to one decimal place and include the appropriate units

This family (ethane, propane, butane, etc) of materials is likely to have what set of properties?

i am from the capital of Vietnam, Hanoi

When lcd televisions first came on the market, they sold for at least $1,000, and some for much more. now many units can be purchased for under $400. these fact

. What can occur when new information about a particular organism is discovered?