Answer:
let the
radius = diameter/2= 32/2= 16cm
now
perimeter of semi circle = <em><u>1</u></em><em><u>/</u></em><em><u>2</u></em><em><u>×</u></em><em><u>22</u></em><em><u>/</u></em><em><u>7</u></em><em><u>×</u></em><em><u>r</u></em>
= 1/2×22/7×16
= 25.14cm
hence perimeter of semi circle is 25 .14cm
1.2mL will be needed to make 50 mL of a 2% solution
<h3>Ratio and proportions</h3>
Ratio are written in form of fractions.
If 50mL is required for a 2% solution, hence;
50% = 2mL
0.05 = 2mL
In order to determine the required mL for a 30% solution, we will have;
30% =x
0.03 = x
Find the ratios
0.5/0.3 = 2/x
Cross multiply
0.5x = 2(0.03)
0.5x = 0.6
x = 0.6/0.5
x = 1.2mL
Therefore 1.2mL will be needed to make 50 mL of a 2% solution
learn more on ratio and proportion here: brainly.com/question/12024093
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Step-by-step explanation:
1. 10Z–4B+3Z+16B–Z = 10Z+3Z–Z+16B–4B
= 12Z+12B = 12(Z+B)
2. –5M–3P+5P+12P = 12P+5P–3P–5M = 14P–5M
3. 12P–4M+8P–3M–2P = 12P+8P–2P–4M–3M
= 18P–7M
4. 10B–5M–4B+8B–4M = 10B+8B–4B–5M–4M
= 14B–9M
5. 4Z+3Z–6Z+B = Z+B
6. 7B+3X–8B+6X = 6X+3X+7B–8B = 9X–B
Answer:7
Step-by-step explanation:
