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Sagot :
Answer:
Q1: C
Q2: F
Q3: C
Step-by-step explanation:
Question 7:
100(3+0.2)^2 -24
According to
P arenthesis
E xponents
M ultiplication
D ivision
A ddition
S ubtraction
We must do the parenthesis first.
100 ( 3 . 2 ) ^ 2 - 24 =
Then exponent
100 * 10 . 24 - 24 =
then multiplication
1024 - 24 =
and finally subtraction
1000 (Option C)
________________________________________________________
Question 8:
Sqrt 50 = 7.07
Sqrt 60 = 7.75
7.07 + 7.75
14.81, which is between 14 and 15, answer choice F
________________________________________________________
Question 9:
A = 13
B = 13
C = 25+36 = 7.81
D = 13
Answer is C, which is the only one which is between positive integers 7 and 8.
Answer:
7) C. 1000
8) F. 14 and 15
9) C. [tex]\sf \sqrt{5^2 + 6^2}[/tex]
Explanation:
7.
⇒ 100(3 + 0.2)² - 24
⇒ 100(3.2)² - 24
⇒ 100(10.24) - 24
⇒ 1024- 24
⇒ 1000
8.
⇒ √50 + √60
⇒ [tex]\sf \sqrt{2 \ \times \ 5^2} + \sqrt{2^2\:\times\: 15}[/tex]
⇒ [tex]\sf 5\sqrt{2 } + 2\sqrt{ 15}[/tex]
⇒ 7.071 + 7.745966
⇒ 14.817
So, it lies between 14 and 15.
9.
A, B, D when simplified gives 11 as an answer.
When simplify C,
[tex]\sf \sqrt{5^2 + 6^2}[/tex]
[tex]\sf \sqrt{25 + 36}[/tex]
[tex]\sf \sqrt{61}[/tex]
[tex]\sf 7.8102396[/tex]
This value lies between 7 and 8.
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