Oh lord help q-q
I have like no time left-

(Triangular pyramid)

Lateral area = 1650

Total surface area = 1860.1

(Triangular prism)

Volume = 660

Step-by-step explanation:

For the triangular pyramid

Area of triangle = × base × height

Area of the base = × 22 × 19.1 = 210.1

Area of the sides = × 22 × 50 = 550

Number of sides (excluding base) = 3

∴ Total Area = 210.1 + (550 × 3)

= 210.1 + 1650 = 1860.1

Lateral Area = (550 × 3)  = 1650

For the triangular prism

Area of the triangle = × 12 × 5 = 30

Volume = Area x Height

Volume = 30 ×  22 = 660

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.