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Sladkaya [172]
3 years ago
5

Soooo yeahhh i know help please.

Mathematics
2 answers:
Andru [333]3 years ago
6 0

Answer:

a

Step-by-step explanation:

vesna_86 [32]3 years ago
6 0

Answer:

a

Step-by-step explanation:

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Find the perimeter of this semi-circle with diameter, d = 39cm. Give your answer rounded to 1 DP.
deff fn [24]

Answer:

p=1/2*3.14+d

1/2*3.14*19.5=30.615

=30.615+39

=69.615

=69.6

Step-by-step explanation:

since it's half a circle we take the formula of acricle to be half

3 0
2 years ago
Triangle S R Q is shown. Angle S R Q is a right angle. An altitude is drawn from point R to point T on side S Q to form a right
juin [17]

Answer:

RT = 12 units

Step-by-step explanation:

From the figure attached,

ΔSRQ is right triangle.

m∠R = 90°

An altitude has been constructed from point T to side SQ.

m∠RTQ = 90°

By applying geometric mean theorem in triangle SRQ,

\frac{\text{RT}}{\text{ST}}=\frac{\text{TQ}}{\text{RT}}

\frac{x}{9}=\frac{16}{x}

x² = 16 × 9

x² = 144

x = √144

x = 12

Therefore, length of altitude RT is 12 units.

5 0
3 years ago
Butyric acid ( c3h7cooh) is a weak acid . what is the ph of a 0.0250 m solution of this acid. ka = 1.5 x 10-5 (2 decimal places)
Wewaii [24]

The pH of the weak acid is 3.21

Butyric acid is known as a weak acid, we need the concentration of [H+] formula of weak acid which is given by this equation :

[H^{+}]=\sqrt{Ka . Ma}

where [H+] is the concentration of ion H+, Ka is the weak acid ionization constant, and Ma is the acid concentration.

Since we know the concentration of H+, the pH can be calculated by using

pH = -log[H+]

From question above, we know that :

Ma = 0.0250M

Ka = 1.5 x 10¯⁵

By using the equation, we can determine the concentration of [H+]

[H+] = √(Ka . Ma)

[H+] = √(1.5 x 10¯⁵ . 0.0250)

[H+] = 6.12 x 10¯⁴ M

Substituting the value of [H+] to get the pH

pH = -log[H+]

pH = -log(6.12 x 10¯⁴)

pH = 3.21

Hence, the pH of the weak acid c3h7cooh is 3.21

Find more on pH at: brainly.com/question/14466719

#SPJ4

8 0
1 year ago
Bu soruyu yapın arkadaşlar acill lütfen yapanı en iyi seçip takip edicem 5 yıldız koyucam<br>​
jok3333 [9.3K]

Step-by-step explanation:

bsbdbxbshzb jdjxhdjzbe

5 0
3 years ago
Find the area of the figure. Assume all figures are made up of parallelograms and triangles.
rewona [7]
<span>b. 60 m2

</span>Find the area of the figure. Assume all figures are made up of parallelograms and triangles.

NOT:
b. 60 m2
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3 years ago
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