Question

Someone please help me

Answer 1

Explanation:

cone: attached picture below

composite shape: To calculate the area of a composite shape you must divide the shape into rectangles, triangles or other shapes you can find the area of and then add the areas back together. You may have to calculate missing lengths before finding the area of some of the shapes.

ratio: not sure about that question sorry

last question: i have no idea what it is about because my device won't open the picture sorry

though i have answered 2 question of yours

have a great evening

Answer 2

Cone

Surface area:

• A = πr(r + l)

• r = √(10² - 8²) = √36 = 6
• A = 3.14(6)(6 + 10) = 301.44

#1

• A = 25π, C = ?
• A = πr² ⇒ 25π = πr² ⇒ r² = 25 ⇒ r = 5
• C = 2πr = 2*3.14*5 = 31.4

#2

• A = 5*7 + (5 - 2)*4 + 1/2*4*(6 - (5 - 2)) = 35 + 12 + 6 = 53

#10

Scale factor

• k = 3/4

Area is a function of two dimensions, each has k applied

• The ratio of areas is the k² = (3/4)² = 9/16

Option C

#6

Volume of prism:

• V = Bh = 1/2(8*5)*6 = 120

Volume of pyramid:

• V = 1/3Bh = 1/3(8*5)*9 = 120

Option A, same volume

#7

Ratio of areas:

• 20/45 = 4/9

Scale factor is:

• k² = 4/9
• k = √4/9
• k = 2/3