Can someone help me pls

Mathematics

2 answers:

ipn [44]2 years ago

7 0

Answer:

B) area of deck = 52.5 m²

Step-by-step explanation:

r = 5.4/2 = 2.7 m

area of tub = πr² = (3.14)(2.7²) = 22.89 m²

overall area = (3.14)(4.9²) = 75.39 m²

area of deck = 75.39 - 22.89 = 52.5 m²

Stels [109]2 years ago

4 0

Answer: This answer for this is A

Step-by-step explanation: Hope this help :D

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the length of a rectangle is five feet less than its width. If the area of the rectangle is 84 square feet, find its dimensions

KIM [24]

Let
x---------> the length of the rectangle
y--------> the width of the rectangle

we know that
A=84 ft²
[area of rectangle]=x*y-----> 84=x*y-----> equation 1
x=y-5------> equation 2
substitute 2 in 1
84=[y-5]*y-----> 84=y²-5y---------> y²-5y-84=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
y=12
x=y-5-----> x=12-5-----> x=7

the answer is
the length of the rectangle is 7 ft
the width of the rectangle is 12 ft

6 0

2 years ago

PLEASE PLEASE PLEASE HELP MEE!!!!!!!!!!!!!!!!

ivanzaharov [21]

Answer:

It is C

Step-by-step explanation:

5 0

2 years ago

A 20 foot ladder leaning against a wall is used to reach a window that is 17 feet above the ground. How far from the wall is the

GarryVolchara [31]

The bottom of the ladder is 10.5 feet away from the wall

Step-by-step explanation:

The given scenario forms a right triangle.

Where

The length of ladder will be the hypotenuse

The wall on which the window is situated will ebt he perpendicular and

The distance between the foot of ladder and the wall will be the base

So,

Hypotenuse = H = 20 foot

Perpendicular = P = 17 feet

Base = B = ?

Using the Pythagoras theorem

$H^2=P^2+B^2\\(20)^2=(17)^2+B^2\\400=289+B^2\\400-289=B^2\\B^2=111\\Taking\ square\ root\ on\ both\ sides\\\sqrt{B^2}=\sqrt{111}\\B=10.53\\Rounding\ off\ to\ the\ nearest\ tenth\\B=10.5$