1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lana71 [14]
3 years ago
9

Austin mowed 7 lawns in 4 hours at the rate how long will it take him to mow 21 lawns

Mathematics
1 answer:
photoshop1234 [79]3 years ago
3 0

7 lawns / 4 hours = 1.75 hours per lawn.

1.75 hours per lawn x 21 lawns = 36.75 hours total ( 36 hours and 45 minutes)

You might be interested in
forty-six out of the total 310 seniors graduate with honors. What is the ratio of seniors graduating with honors to the total nu
LekaFEV [45]
46 seniors graduate with honors out of 356 seniors
5 0
3 years ago
4x+6< or equal to 52
shutvik [7]
The answer to the question

7 0
3 years ago
Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. What is the
motikmotik

Answer:

45.44/71 - 1 = -0.36 = -36%

36% decrease.

7 0
3 years ago
You have 42,784 grams of a radioactive kind of curium. If its half-life is 18 years, how much will be left after 72 years?
s344n2d4d5 [400]

Answer:

2,674.14 g

Step-by-step explanation:

Recall that the formula for radioactive decay is

N = N₀ e^(-λt)

where,

N is the amount left at time t

N₀ is the initial amount when t=0, (given as 42,784 g)

λ = coefficient of radioactive decay

  = 0.693 ÷ Half Life

  = 0.693 ÷ 18

  = 0.0385

t = time elapsed (given as 72 years)

e = exponential constant ( approx 2.7183)

If we substitute these into our equation:

N = N₀ e^(-λt)

= (42,787) (2.7183)^[(-0.0385)(72)]

= (42,787) (2.7183)^(-2.7726)

=  (42,787) (0.0625)

= 2,674.14 g

6 0
3 years ago
What is the distance between the points (-5, 10) and (-5, 2)?
Alona [7]
8 units hope I helped
7 0
3 years ago
Other questions:
  • How do i do this equation <br> -3(-2y-4)-5y-2=
    13·1 answer
  • Just answer question, No need to explain. THANKS
    13·2 answers
  • Plz help need help fast plz
    15·1 answer
  • Which of the following integrals represents the area of the region bounded in the first quadrant by x = pi/ 4 and the functions
    11·1 answer
  • What are th minimum,first quartile,median,third quartile,and maximum of the data set? 12,6,8,3,10,15,18,7
    7·2 answers
  • Write an equation of a line that has a slope of 6 and a x-intercept of 0
    11·1 answer
  • 389,422 round up to the nearest hundred thousand
    11·1 answer
  • Carmine is packing 27 superballs in 3 square layers. Each ball has a diameter of 4 cm.
    15·1 answer
  • 3 (n - 4) = 36<br> please show work if you can
    6·2 answers
  • If 2x-3=4 <br>so x is ??<br>wrong answer will be reported ​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!